136623520 has 72 divisors (see below), whose sum is σ = 354833892. Its totient is φ = 49674240.

The previous prime is 136623491. The next prime is 136623523. The reversal of 136623520 is 25326631.

It can be written as a sum of positive squares in 2 ways, for example, as 123921424 + 12702096 = 11132^2 + 3564^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (136623523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15832 + ... + 22888.

Almost surely, 2^136623520 is an apocalyptic number.

136623520 is a gapful number since it is divisible by the number (10) 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 136623520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177416946).

136623520 is an abundant number, since it is smaller than the sum of its proper divisors (218210372).

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

136623520 is a wasteful number, since it uses less digits than its factorization.

136623520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094 (or 7075 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 136623520 is about 11688.6064182177. The cubic root of 136623520 is about 515.0410247898.

The spelling of 136623520 in words is "one hundred thirty-six million, six hundred twenty-three thousand, five hundred twenty".