136621880 has 64 divisors (see below), whose sum is σ = 313878240. Its totient is φ = 53512192.

The previous prime is 136621861. The next prime is 136621897. The reversal of 136621880 is 88126631.

It is a self number, because there is not a number n which added to its sum of digits gives 136621880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586244 + ... + 586476.

Almost surely, 2^136621880 is an apocalyptic number.

136621880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136621880 is an abundant number, since it is smaller than the sum of its proper divisors (177256360).

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

136621880 is a wasteful number, since it uses less digits than its factorization.

136621880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 136621880 is about 11688.5362642206. The cubic root of 136621880 is about 515.0389639669.

The spelling of 136621880 in words is "one hundred thirty-six million, six hundred twenty-one thousand, eight hundred eighty".