139237856 has 24 divisors (see below), whose sum is σ = 274388184. Its totient is φ = 69552000.

The previous prime is 139237853. The next prime is 139237873. The reversal of 139237856 is 658732931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139237853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60731 + ... + 62981.

It is an arithmetic number, because the mean of its divisors is an integer number (11432841).

Almost surely, 2^139237856 is an apocalyptic number.

139237856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139237856 is a deficient number, since it is larger than the sum of its proper divisors (135150328).

139237856 is a wasteful number, since it uses less digits than its factorization.

139237856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4186 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The square root of 139237856 is about 11799.9091521927. The cubic root of 139237856 is about 518.3054503553.

The spelling of 139237856 in words is "one hundred thirty-nine million, two hundred thirty-seven thousand, eight hundred fifty-six".