139895040 has 144 divisors (see below), whose sum is σ = 473292288. Its totient is φ = 35094528.

The previous prime is 139895027. The next prime is 139895047. The reversal of 139895040 is 40598931.

It is a self number, because there is not a number n which added to its sum of digits gives 139895040.

It is not an unprimeable number, because it can be changed into a prime (139895047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64209 + ... + 66351.

It is an arithmetic number, because the mean of its divisors is an integer number (3286752).

Almost surely, 2^139895040 is an apocalyptic number.

139895040 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 139895040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236646144).

139895040 is an abundant number, since it is smaller than the sum of its proper divisors (333397248).

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

139895040 is a wasteful number, since it uses less digits than its factorization.

139895040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2170 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 139895040 is about 11827.7233650437. The cubic root of 139895040 is about 519.1196148430.

The spelling of 139895040 in words is "one hundred thirty-nine million, eight hundred ninety-five thousand, forty".