139730432 has 20 divisors (see below), whose sum is σ = 279188976. Its totient is φ = 69864960.

The previous prime is 139730431. The next prime is 139730453. The reversal of 139730432 is 234037931.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139730431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135944 + ... + 136967.

Almost surely, 2^139730432 is an apocalyptic number.

It is an amenable number.

139730432 is a deficient number, since it is larger than the sum of its proper divisors (139458544).

139730432 is an frugal number, since it uses more digits than its factorization.

139730432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272929 (or 272913 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 139730432 is about 11820.7627503474. The cubic root of 139730432 is about 518.9159269472.

The spelling of 139730432 in words is "one hundred thirty-nine million, seven hundred thirty thousand, four hundred thirty-two".