136890784 has 12 divisors (see below), whose sum is σ = 269503794. Its totient is φ = 68445376.

The previous prime is 136890773. The next prime is 136890791. The reversal of 136890784 is 487098631.

It is a happy number.

136890784 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 136890000 + 784 = 11700^2 + 28^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2138887 + ... + 2138950.

Almost surely, 2^136890784 is an apocalyptic number.

It is an amenable number.

136890784 is a deficient number, since it is larger than the sum of its proper divisors (132613010).

136890784 is an equidigital number, since it uses as much as digits as its factorization.

136890784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277847 (or 4277839 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 136890784 is about 11700.0335042255. The cubic root of 136890784 is about 515.3766484640.

The spelling of 136890784 in words is "one hundred thirty-six million, eight hundred ninety thousand, seven hundred eighty-four".