136720408 has 32 divisors (see below), whose sum is σ = 280949760. Its totient is φ = 61858080.

The previous prime is 136720399. The next prime is 136720411. The reversal of 136720408 is 804027631.

It is a self number, because there is not a number n which added to its sum of digits gives 136720408.

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, 16141 + ... + 23107.

It is an arithmetic number, because the mean of its divisors is an integer number (8779680).

Almost surely, 2^136720408 is an apocalyptic number.

It is an amenable number.

136720408 is an abundant number, since it is smaller than the sum of its proper divisors (144229352).

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

136720408 is a wasteful number, since it uses less digits than its factorization.

136720408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7207 (or 7203 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 136720408 is about 11692.7502325159. The cubic root of 136720408 is about 515.1627449335.

The spelling of 136720408 in words is "one hundred thirty-six million, seven hundred twenty thousand, four hundred eight".