136823904 has 120 divisors (see below), whose sum is σ = 459941328. Its totient is φ = 39087360.

The previous prime is 136823879. The next prime is 136823917. The reversal of 136823904 is 409328631.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14374 + ... + 21914.

Almost surely, 2^136823904 is an apocalyptic number.

136823904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136823904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229970664).

136823904 is an abundant number, since it is smaller than the sum of its proper divisors (323117424).

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

136823904 is an equidigital number, since it uses as much as digits as its factorization.

136823904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7570 (or 7553 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 136823904 is about 11697.1750435736. The cubic root of 136823904 is about 515.2927031851.

The spelling of 136823904 in words is "one hundred thirty-six million, eight hundred twenty-three thousand, nine hundred four".