136920290 has 16 divisors (see below), whose sum is σ = 265414968. Its totient is φ = 50555136.

The previous prime is 136920263. The next prime is 136920323. The reversal of 136920290 is 92029631.

It can be written as a sum of positive squares in 4 ways, for example, as 102475129 + 34445161 = 10123^2 + 5869^2 .

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, 526487 + ... + 526746.

Almost surely, 2^136920290 is an apocalyptic number.

136920290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136920290 is a deficient number, since it is larger than the sum of its proper divisors (128494678).

136920290 is a wasteful number, since it uses less digits than its factorization.

136920290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053253.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 136920290 is about 11701.2943728461. The cubic root of 136920290 is about 515.4136746014.

The spelling of 136920290 in words is "one hundred thirty-six million, nine hundred twenty thousand, two hundred ninety".