139865976 has 48 divisors (see below), whose sum is σ = 382178160. Its totient is φ = 46206720.

The previous prime is 139865969. The next prime is 139865977. The reversal of 139865976 is 679568931.

139865976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139865977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (7962045).

Almost surely, 2^139865976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139865976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191089080).

139865976 is an abundant number, since it is smaller than the sum of its proper divisors (242312184).

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

139865976 is a wasteful number, since it uses less digits than its factorization.

139865976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17316 (or 17309 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 139865976 is about 11826.4946624095. The cubic root of 139865976 is about 519.0836623235.

The spelling of 139865976 in words is "one hundred thirty-nine million, eight hundred sixty-five thousand, nine hundred seventy-six".