136253538 has 48 divisors (see below), whose sum is σ = 317921760. Its totient is φ = 42016128.

The previous prime is 136253531. The next prime is 136253539. The reversal of 136253538 is 835352631.

136253538 is a `hidden beast` number, since 13 + 62 + 53 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (136253531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14281 + ... + 21827.

It is an arithmetic number, because the mean of its divisors is an integer number (6623370).

Almost surely, 2^136253538 is an apocalyptic number.

136253538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 136253538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158960880).

136253538 is an abundant number, since it is smaller than the sum of its proper divisors (181668222).

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

136253538 is a wasteful number, since it uses less digits than its factorization.

136253538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631 (or 7628 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 136253538 is about 11672.7690802140. The cubic root of 136253538 is about 514.5756871996.

The spelling of 136253538 in words is "one hundred thirty-six million, two hundred fifty-three thousand, five hundred thirty-eight".