402280008 has 128 divisors (see below), whose sum is σ = 1155840000. Its totient is φ = 115644672.

The previous prime is 402279991. The next prime is 402280013. The reversal of 402280008 is 800082204.

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 402280008.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467883 + ... + 468741.

It is an arithmetic number, because the mean of its divisors is an integer number (9030000).

Almost surely, 2^402280008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402280008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577920000).

402280008 is an abundant number, since it is smaller than the sum of its proper divisors (753559992).

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

402280008 is a wasteful number, since it uses less digits than its factorization.

402280008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 402280008 is about 20056.9192051023. The cubic root of 402280008 is about 738.2035851113.

The spelling of 402280008 in words is "four hundred two million, two hundred eighty thousand, eight".