402424884 has 36 divisors (see below), whose sum is σ = 1077080004. Its totient is φ = 126250752.

The previous prime is 402424873. The next prime is 402424889. The reversal of 402424884 is 488424204.

402424884 is a `hidden beast` number, since 402 + 4 + 248 + 8 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 353816100 + 48608784 = 18810^2 + 6972^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402424889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328167 + ... + 329390.

It is an arithmetic number, because the mean of its divisors is an integer number (29918889).

Almost surely, 2^402424884 is an apocalyptic number.

It is an amenable number.

402424884 is an abundant number, since it is smaller than the sum of its proper divisors (674655120).

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

402424884 is a wasteful number, since it uses less digits than its factorization.

402424884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657584 (or 657579 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 36.

The square root of 402424884 is about 20060.5305014598. The cubic root of 402424884 is about 738.2921926686.

The spelling of 402424884 in words is "four hundred two million, four hundred twenty-four thousand, eight hundred eighty-four".