136720432 has 20 divisors (see below), whose sum is σ = 265507560. Its totient is φ = 68202368.

The previous prime is 136720411. The next prime is 136720469. The reversal of 136720432 is 234027631.

It is a self number, because there is not a number n which added to its sum of digits gives 136720432.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557 + ... + 16732.

It is an arithmetic number, because the mean of its divisors is an integer number (13275378).

Almost surely, 2^136720432 is an apocalyptic number.

It is an amenable number.

136720432 is a deficient number, since it is larger than the sum of its proper divisors (128787128).

136720432 is a wasteful number, since it uses less digits than its factorization.

136720432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19740 (or 19734 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 136720432 is about 11692.7512587928. The cubic root of 136720432 is about 515.1627750775.

The spelling of 136720432 in words is "one hundred thirty-six million, seven hundred twenty thousand, four hundred thirty-two".