136711920 has 120 divisors (see below), whose sum is σ = 433664208. Its totient is φ = 35624960.

The previous prime is 136711853. The next prime is 136711951. The reversal of 136711920 is 29117631.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1209784 + ... + 1209896.

Almost surely, 2^136711920 is an apocalyptic number.

136711920 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 136711920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216832104).

136711920 is an abundant number, since it is smaller than the sum of its proper divisors (296952288).

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

136711920 is a wasteful number, since it uses less digits than its factorization.

136711920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 136711920 is about 11692.3872669357. The cubic root of 136711920 is about 515.1520837797.

The spelling of 136711920 in words is "one hundred thirty-six million, seven hundred eleven thousand, nine hundred twenty".