136640490 has 32 divisors (see below), whose sum is σ = 374785920. Its totient is φ = 31232064.

The previous prime is 136640479. The next prime is 136640503. The reversal of 136640490 is 94046631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325125 + ... + 325544.

It is an arithmetic number, because the mean of its divisors is an integer number (11712060).

Almost surely, 2^136640490 is an apocalyptic number.

136640490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136640490 is an abundant number, since it is smaller than the sum of its proper divisors (238145430).

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

136640490 is a wasteful number, since it uses less digits than its factorization.

136640490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650686.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 136640490 is about 11689.3323162617. The cubic root of 136640490 is about 515.0623483129.

The spelling of 136640490 in words is "one hundred thirty-six million, six hundred forty thousand, four hundred ninety".