139955040 has 120 divisors (see below), whose sum is σ = 493970400. Its totient is φ = 37317888.

The previous prime is 139955009. The next prime is 139955041. The reversal of 139955040 is 40559931.

139955040 is a `hidden beast` number, since 13 + 99 + 550 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 139954986 and 139955004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139955041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7561 + ... + 18359.

It is an arithmetic number, because the mean of its divisors is an integer number (4116420).

Almost surely, 2^139955040 is an apocalyptic number.

139955040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139955040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246985200).

139955040 is an abundant number, since it is smaller than the sum of its proper divisors (354015360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139955040 is a wasteful number, since it uses less digits than its factorization.

139955040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826 (or 10809 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 139955040 is about 11830.2595068747. The cubic root of 139955040 is about 519.1938198208.

It can be divided in two parts, 1 and 39955040, that added together give a square (39955041 = 6321²).

The spelling of 139955040 in words is "one hundred thirty-nine million, nine hundred fifty-five thousand, forty".