139478732 has 18 divisors (see below), whose sum is σ = 245565852. Its totient is φ = 69319024.

The previous prime is 139478723. The next prime is 139478737. The reversal of 139478732 is 237874931.

139478732 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

139478732 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (139478737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401783 + ... + 402129.

Almost surely, 2^139478732 is an apocalyptic number.

It is an amenable number.

139478732 is a deficient number, since it is larger than the sum of its proper divisors (106087120).

139478732 is an equidigital number, since it uses as much as digits as its factorization.

139478732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 666 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 139478732 is about 11810.1114304650. Note that the first 3 decimals coincide. The cubic root of 139478732 is about 518.6041608322.

The spelling of 139478732 in words is "one hundred thirty-nine million, four hundred seventy-eight thousand, seven hundred thirty-two".