402660420 has 48 divisors (see below), whose sum is σ = 1130068800. Its totient is φ = 107126656.

The previous prime is 402660413. The next prime is 402660439. The reversal of 402660420 is 24066204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19006 + ... + 34154.

It is an arithmetic number, because the mean of its divisors is an integer number (23543100).

Almost surely, 2^402660420 is an apocalyptic number.

It is an amenable number.

402660420 is an abundant number, since it is smaller than the sum of its proper divisors (727408380).

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

402660420 is a wasteful number, since it uses less digits than its factorization.

402660420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15604 (or 15602 counting only the distinct ones).

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

The square root of 402660420 is about 20066.4002750867. The cubic root of 402660420 is about 738.4362033743.

It can be divided in two parts, 4026 and 60420, that added together give a palindrome (64446).

The spelling of 402660420 in words is "four hundred two million, six hundred sixty thousand, four hundred twenty".