136402440 has 64 divisors (see below), whose sum is σ = 412378560. Its totient is φ = 36092160.

The previous prime is 136402439. The next prime is 136402447. The reversal of 136402440 is 44204631.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 136402440.

It is not an unprimeable number, because it can be changed into a prime (136402447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11382 + ... + 20058.

It is an arithmetic number, because the mean of its divisors is an integer number (6443415).

Almost surely, 2^136402440 is an apocalyptic number.

136402440 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 136402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206189280).

136402440 is an abundant number, since it is smaller than the sum of its proper divisors (275976120).

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

136402440 is a wasteful number, since it uses less digits than its factorization.

136402440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8822 (or 8818 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 136402440 is about 11679.1455166891. The cubic root of 136402440 is about 514.7630669321.

The spelling of 136402440 in words is "one hundred thirty-six million, four hundred two thousand, four hundred forty".