136769920 has 64 divisors (see below), whose sum is σ = 373687200. Its totient is φ = 46891008.

The previous prime is 136769863. The next prime is 136769921. The reversal of 136769920 is 29967631.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×136769920² = 37412022033612800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136769921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10785 + ... + 19744.

Almost surely, 2^136769920 is an apocalyptic number.

136769920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136769920 is an abundant number, since it is smaller than the sum of its proper divisors (236917280).

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

136769920 is an equidigital number, since it uses as much as digits as its factorization.

136769920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30555 (or 30543 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 136769920 is about 11694.8672502085. The cubic root of 136769920 is about 515.2249245301.

The spelling of 136769920 in words is "one hundred thirty-six million, seven hundred sixty-nine thousand, nine hundred twenty".