408042660 has 96 divisors (see below), whose sum is σ = 1202285952. Its totient is φ = 103265280.

The previous prime is 408042617. The next prime is 408042683. The reversal of 408042660 is 66240804.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88779 + ... + 93261.

It is an arithmetic number, because the mean of its divisors is an integer number (12523812).

Almost surely, 2^408042660 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 408042660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601142976).

408042660 is an abundant number, since it is smaller than the sum of its proper divisors (794243292).

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

408042660 is a wasteful number, since it uses less digits than its factorization.

408042660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573 (or 4571 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 408042660 is about 20200.0658414769. The cubic root of 408042660 is about 741.7118028893.

The spelling of 408042660 in words is "four hundred eight million, forty-two thousand, six hundred sixty".