136139864 has 32 divisors (see below), whose sum is σ = 307084800. Its totient is φ = 55274400.

The previous prime is 136139863. The next prime is 136139867. The reversal of 136139864 is 468931631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136139863) by changing a digit.

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, 62912 + ... + 65039.

It is an arithmetic number, because the mean of its divisors is an integer number (9596400).

Almost surely, 2^136139864 is an apocalyptic number.

136139864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

136139864 is an abundant number, since it is smaller than the sum of its proper divisors (170944936).

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

136139864 is a wasteful number, since it uses less digits than its factorization.

136139864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127983 (or 127979 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 136139864 is about 11667.8988682624. The cubic root of 136139864 is about 514.4325468161.

The spelling of 136139864 in words is "one hundred thirty-six million, one hundred thirty-nine thousand, eight hundred sixty-four".