136621620 has 48 divisors (see below), whose sum is σ = 425046720. Its totient is φ = 36432288.

The previous prime is 136621607. The next prime is 136621631. The reversal of 136621620 is 26126631.

136621620 is a `hidden beast` number, since 1 + 36 + 6 + 2 + 1 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 125962 + ... + 127041.

It is an arithmetic number, because the mean of its divisors is an integer number (8855140).

Almost surely, 2^136621620 is an apocalyptic number.

136621620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136621620 is an abundant number, since it is smaller than the sum of its proper divisors (288425100).

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

136621620 is a wasteful number, since it uses less digits than its factorization.

136621620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253021 (or 253013 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 136621620 is about 11688.5251422068. The cubic root of 136621620 is about 515.0386372495.

The spelling of 136621620 in words is "one hundred thirty-six million, six hundred twenty-one thousand, six hundred twenty".