139023856 has 10 divisors (see below), whose sum is σ = 269358752. Its totient is φ = 69511920.

The previous prime is 139023853. The next prime is 139023887. The reversal of 139023856 is 658320931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139023851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4344480 + ... + 4344511.

Almost surely, 2^139023856 is an apocalyptic number.

139023856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139023856 is a deficient number, since it is larger than the sum of its proper divisors (130334896).

139023856 is an equidigital number, since it uses as much as digits as its factorization.

139023856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8688999 (or 8688993 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 139023856 is about 11790.8377989013. The cubic root of 139023856 is about 518.0397796953.

The spelling of 139023856 in words is "one hundred thirty-nine million, twenty-three thousand, eight hundred fifty-six".