402440204040 has 64 divisors (see below), whose sum is σ = 1379794988160. Its totient is φ = 91986332160.

The previous prime is 402440204029. The next prime is 402440204099. The reversal of 402440204040 is 40402044204.

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 402440204040.

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, 239546901 + ... + 239548580.

It is an arithmetic number, because the mean of its divisors is an integer number (21559296690).

Almost surely, 2^402440204040 is an apocalyptic number.

402440204040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402440204040 is an abundant number, since it is smaller than the sum of its proper divisors (977354784120).

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

402440204040 is a wasteful number, since it uses less digits than its factorization.

402440204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479095502 (or 479095498 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 402440204040 its reverse (40402044204), we get a palindrome (442842248244).

The spelling of 402440204040 in words is "four hundred two billion, four hundred forty million, two hundred four thousand, forty".