139317432 has 64 divisors (see below), whose sum is σ = 360422400. Its totient is φ = 44841600.

The previous prime is 139317413. The next prime is 139317433. The reversal of 139317432 is 234713931.

It is a junction number, because it is equal to n+sod(n) for n = 139317393 and 139317402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139317433) 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, 133569 + ... + 134607.

It is an arithmetic number, because the mean of its divisors is an integer number (5631600).

Almost surely, 2^139317432 is an apocalyptic number.

139317432 is a gapful number since it is divisible by the number (12) 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 139317432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180211200).

139317432 is an abundant number, since it is smaller than the sum of its proper divisors (221104968).

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

139317432 is a wasteful number, since it uses less digits than its factorization.

139317432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1232 counting only the distinct ones).

The product of its digits is 13608, while the sum is 33.

The square root of 139317432 is about 11803.2805609288. The cubic root of 139317432 is about 518.4041706817.

The spelling of 139317432 in words is "one hundred thirty-nine million, three hundred seventeen thousand, four hundred thirty-two".