136708638 has 16 divisors (see below), whose sum is σ = 298273536. Its totient is φ = 41426840.

The previous prime is 136708549. The next prime is 136708661. The reversal of 136708638 is 836807631.

It is a self number, because there is not a number n which added to its sum of digits gives 136708638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035606 + ... + 1035737.

It is an arithmetic number, because the mean of its divisors is an integer number (18642096).

Almost surely, 2^136708638 is an apocalyptic number.

136708638 is an abundant number, since it is smaller than the sum of its proper divisors (161564898).

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

136708638 is a wasteful number, since it uses less digits than its factorization.

136708638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071359.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 136708638 is about 11692.2469183643. The cubic root of 136708638 is about 515.1479613821.

The spelling of 136708638 in words is "one hundred thirty-six million, seven hundred eight thousand, six hundred thirty-eight".