136920864 has 48 divisors (see below), whose sum is σ = 360061632. Its totient is φ = 45558528.

The previous prime is 136920841. The next prime is 136920913. The reversal of 136920864 is 468029631.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 78142 + ... + 79874.

It is an arithmetic number, because the mean of its divisors is an integer number (7501284).

Almost surely, 2^136920864 is an apocalyptic number.

It is an amenable number.

136920864 is an abundant number, since it is smaller than the sum of its proper divisors (223140768).

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

136920864 is a wasteful number, since it uses less digits than its factorization.

136920864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569 (or 2561 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 136920864 is about 11701.3189000215. The cubic root of 136920864 is about 515.4143948430.

The spelling of 136920864 in words is "one hundred thirty-six million, nine hundred twenty thousand, eight hundred sixty-four".