136397520 has 400 divisors, whose sum is σ = 564630528. Its totient is φ = 29859840.

The previous prime is 136397509. The next prime is 136397537. The reversal of 136397520 is 25793631.

136397520 is a `hidden beast` number, since 13 + 639 + 7 + 5 + 2 + 0 = 666.

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 79 ways as a sum of consecutive naturals, for example, 1406112 + ... + 1406208.

Almost surely, 2^136397520 is an apocalyptic number.

136397520 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 136397520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282315264).

136397520 is an abundant number, since it is smaller than the sum of its proper divisors (428233008).

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

136397520 is a wasteful number, since it uses less digits than its factorization.

136397520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 136397520 is about 11678.9348829420. The cubic root of 136397520 is about 514.7568777351.

The spelling of 136397520 in words is "one hundred thirty-six million, three hundred ninety-seven thousand, five hundred twenty".