139847040 has 128 divisors (see below), whose sum is σ = 495352800. Its totient is φ = 37287936.

The previous prime is 139847033. The next prime is 139847041. The reversal of 139847040 is 40748931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 139846986 and 139847004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139847041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13234 + ... + 21326.

Almost surely, 2^139847040 is an apocalyptic number.

139847040 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 139847040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247676400).

139847040 is an abundant number, since it is smaller than the sum of its proper divisors (355505760).

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

139847040 is an equidigital number, since it uses as much as digits as its factorization.

139847040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121 (or 8103 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 139847040 is about 11825.6940599696. The cubic root of 139847040 is about 519.0602355828.

The spelling of 139847040 in words is "one hundred thirty-nine million, eight hundred forty-seven thousand, forty".