139556890 has 64 divisors (see below), whose sum is σ = 282175488. Its totient is φ = 49268800.

The previous prime is 139556873. The next prime is 139556917. The reversal of 139556890 is 98655931.

It is a super-2 number, since 2×139556890² = 38952251092944200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139556890.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 835587 + ... + 835753.

It is an arithmetic number, because the mean of its divisors is an integer number (4408992).

Almost surely, 2^139556890 is an apocalyptic number.

139556890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139556890 is an abundant number, since it is smaller than the sum of its proper divisors (142618598).

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

139556890 is a wasteful number, since it uses less digits than its factorization.

139556890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 139556890 is about 11813.4199112704. The cubic root of 139556890 is about 518.7010107122.

It can be divided in two parts, 1395 and 56890, that added together give a palindrome (58285).

The spelling of 139556890 in words is "one hundred thirty-nine million, five hundred fifty-six thousand, eight hundred ninety".