139969232 has 40 divisors (see below), whose sum is σ = 295371720. Its totient is φ = 63866880.

The previous prime is 139969217. The next prime is 139969273. The reversal of 139969232 is 232969931.

It can be written as a sum of positive squares in 4 ways, for example, as 1577536 + 138391696 = 1256^2 + 11764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14732 + ... + 22292.

It is an arithmetic number, because the mean of its divisors is an integer number (7384293).

Almost surely, 2^139969232 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 139969232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147685860).

139969232 is an abundant number, since it is smaller than the sum of its proper divisors (155402488).

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

139969232 is a wasteful number, since it uses less digits than its factorization.

139969232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7671 (or 7665 counting only the distinct ones).

The product of its digits is 157464, while the sum is 44.

The square root of 139969232 is about 11830.8593094500. The cubic root of 139969232 is about 519.2113686699.

The spelling of 139969232 in words is "one hundred thirty-nine million, nine hundred sixty-nine thousand, two hundred thirty-two".