402004120 has 64 divisors (see below), whose sum is σ = 1078686720. Its totient is φ = 131835264.

The previous prime is 402004069. The next prime is 402004193. The reversal of 402004120 is 21400204.

It is a self number, because there is not a number n which added to its sum of digits gives 402004120.

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, 24772 + ... + 37651.

It is an arithmetic number, because the mean of its divisors is an integer number (16854480).

Almost surely, 2^402004120 is an apocalyptic number.

402004120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402004120 is an abundant number, since it is smaller than the sum of its proper divisors (676682600).

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

402004120 is a wasteful number, since it uses less digits than its factorization.

402004120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62464 (or 62460 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 402004120 is about 20050.0403989618. The cubic root of 402004120 is about 738.0347905055.

Adding to 402004120 its reverse (21400204), we get a palindrome (423404324).

The spelling of 402004120 in words is "four hundred two million, four thousand, one hundred twenty".