136021440 has 56 divisors (see below), whose sum is σ = 431871120. Its totient is φ = 36272128.

The previous prime is 136021367. The next prime is 136021453. The reversal of 136021440 is 44120631.

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, 69885 + ... + 71804.

Almost surely, 2^136021440 is an apocalyptic number.

136021440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136021440 is an abundant number, since it is smaller than the sum of its proper divisors (295849680).

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

136021440 is a wasteful number, since it uses less digits than its factorization.

136021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141709 (or 141699 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 136021440 is about 11662.8229858812. The cubic root of 136021440 is about 514.2833403770.

The spelling of 136021440 in words is "one hundred thirty-six million, twenty-one thousand, four hundred forty".