139591896 has 64 divisors (see below), whose sum is σ = 371952000. Its totient is φ = 43504128.

The previous prime is 139591891. The next prime is 139591919. The reversal of 139591896 is 698195931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139591891) 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, 65455 + ... + 67553.

It is an arithmetic number, because the mean of its divisors is an integer number (5811750).

Almost surely, 2^139591896 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 139591896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185976000).

139591896 is an abundant number, since it is smaller than the sum of its proper divisors (232360104).

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

139591896 is a wasteful number, since it uses less digits than its factorization.

139591896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2284 counting only the distinct ones).

The product of its digits is 524880, while the sum is 51.

The square root of 139591896 is about 11814.9014384378. The cubic root of 139591896 is about 518.7443768491.

The spelling of 139591896 in words is "one hundred thirty-nine million, five hundred ninety-one thousand, eight hundred ninety-six".