139385856 has 132 divisors (see below), whose sum is σ = 397167128. Its totient is φ = 43450368.

The previous prime is 139385809. The next prime is 139385863. The reversal of 139385856 is 658583931.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 887730 + ... + 887886.

Almost surely, 2^139385856 is an apocalyptic number.

139385856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139385856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198583564).

139385856 is an abundant number, since it is smaller than the sum of its proper divisors (257781272).

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

139385856 is a wasteful number, since it uses less digits than its factorization.

139385856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 179 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 139385856 is about 11806.1787213306. The cubic root of 139385856 is about 518.4890260152.

The spelling of 139385856 in words is "one hundred thirty-nine million, three hundred eighty-five thousand, eight hundred fifty-six".