139211856 has 60 divisors (see below), whose sum is σ = 445260192. Its totient is φ = 39774528.

The previous prime is 139211767. The next prime is 139211869. The reversal of 139211856 is 658112931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 139211856.

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, 68046 + ... + 70061.

Almost surely, 2^139211856 is an apocalyptic number.

139211856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139211856 is an abundant number, since it is smaller than the sum of its proper divisors (306048336).

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

139211856 is a wasteful number, since it uses less digits than its factorization.

139211856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138128 (or 138119 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 139211856 is about 11798.8073973601. The cubic root of 139211856 is about 518.2731871453.

The spelling of 139211856 in words is "one hundred thirty-nine million, two hundred eleven thousand, eight hundred fifty-six".