136044640 has 96 divisors (see below), whose sum is σ = 334103616. Its totient is φ = 52316160.

The previous prime is 136044613. The next prime is 136044653. The reversal of 136044640 is 46440631.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 136044599 and 136044608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517149 + ... + 517411.

It is an arithmetic number, because the mean of its divisors is an integer number (3480246).

Almost surely, 2^136044640 is an apocalyptic number.

136044640 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 136044640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167051808).

136044640 is an abundant number, since it is smaller than the sum of its proper divisors (198058976).

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

136044640 is a wasteful number, since it uses less digits than its factorization.

136044640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 136044640 is about 11663.8175568722. The cubic root of 136044640 is about 514.3125776679.

The spelling of 136044640 in words is "one hundred thirty-six million, forty-four thousand, six hundred forty".