136139872 has 48 divisors (see below), whose sum is σ = 300322512. Its totient is φ = 60203520.

The previous prime is 136139867. The next prime is 136139911. The reversal of 136139872 is 278931631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7798 + ... + 18250.

It is an arithmetic number, because the mean of its divisors is an integer number (6256719).

Almost surely, 2^136139872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136139872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150161256).

136139872 is an abundant number, since it is smaller than the sum of its proper divisors (164182640).

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

136139872 is a wasteful number, since it uses less digits than its factorization.

136139872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511 (or 10503 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 136139872 is about 11667.8992110834. The cubic root of 136139872 is about 514.4325568927.

The spelling of 136139872 in words is "one hundred thirty-six million, one hundred thirty-nine thousand, eight hundred seventy-two".