136861620 has 48 divisors (see below), whose sum is σ = 437958528. Its totient is φ = 31282560.

The previous prime is 136861607. The next prime is 136861633. The reversal of 136861620 is 26168631.

It is an interprime number because it is at equal distance from previous prime (136861607) and next prime (136861633).

It is a super-2 number, since 2×136861620² = 37462206058048800, which contains 22 as substring.

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, 162511 + ... + 163350.

It is an arithmetic number, because the mean of its divisors is an integer number (9124136).

Almost surely, 2^136861620 is an apocalyptic number.

136861620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136861620 is an abundant number, since it is smaller than the sum of its proper divisors (301096908).

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

136861620 is a wasteful number, since it uses less digits than its factorization.

136861620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325880 (or 325878 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 136861620 is about 11698.7871166203. The cubic root of 136861620 is about 515.3400462627.

The spelling of 136861620 in words is "one hundred thirty-six million, eight hundred sixty-one thousand, six hundred twenty".