136890638 has 8 divisors (see below), whose sum is σ = 205421160. Its totient is φ = 68416920.

The previous prime is 136890623. The next prime is 136890659. The reversal of 136890638 is 836098631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 7553 + ... + 18188.

It is an arithmetic number, because the mean of its divisors is an integer number (25677645).

Almost surely, 2^136890638 is an apocalyptic number.

136890638 is a deficient number, since it is larger than the sum of its proper divisors (68530522).

136890638 is a wasteful number, since it uses less digits than its factorization.

136890638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28402.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 136890638 is about 11700.0272649255. The cubic root of 136890638 is about 515.3764652400.

The spelling of 136890638 in words is "one hundred thirty-six million, eight hundred ninety thousand, six hundred thirty-eight".