139109056 has 56 divisors (see below), whose sum is σ = 287670240. Its totient is φ = 66662400.

The previous prime is 139109053. The next prime is 139109057. The reversal of 139109056 is 650901931.

It is a super-2 number, since 2×139109056² = 38702658922422272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139109053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447141 + ... + 447451.

Almost surely, 2^139109056 is an apocalyptic number.

139109056 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 139109056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143835120).

139109056 is an abundant number, since it is smaller than the sum of its proper divisors (148561184).

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

139109056 is a wasteful number, since it uses less digits than its factorization.

139109056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 139109056 is about 11794.4502203367. The cubic root of 139109056 is about 518.1455840207.

The spelling of 139109056 in words is "one hundred thirty-nine million, one hundred nine thousand, fifty-six".