402402040 has 64 divisors (see below), whose sum is σ = 921922560. Its totient is φ = 158054400.

The previous prime is 402402029. The next prime is 402402071. The reversal of 402402040 is 40204204.

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, 573690 + ... + 574390.

It is an arithmetic number, because the mean of its divisors is an integer number (14405040).

Almost surely, 2^402402040 is an apocalyptic number.

402402040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402402040 is an abundant number, since it is smaller than the sum of its proper divisors (519520520).

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

402402040 is a wasteful number, since it uses less digits than its factorization.

402402040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402402040 is about 20059.9611166124. The cubic root of 402402040 is about 738.2782224705.

Adding to 402402040 its reverse (40204204), we get a palindrome (442606244).

The spelling of 402402040 in words is "four hundred two million, four hundred two thousand, forty".