402869808 has 160 divisors (see below), whose sum is σ = 1335985920. Its totient is φ = 114877440.

The previous prime is 402869807. The next prime is 402869843. The reversal of 402869808 is 808968204.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (402869807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78291 + ... + 83277.

It is an arithmetic number, because the mean of its divisors is an integer number (8349912).

Almost surely, 2^402869808 is an apocalyptic number.

402869808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402869808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667992960).

402869808 is an abundant number, since it is smaller than the sum of its proper divisors (933116112).

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

402869808 is a wasteful number, since it uses less digits than its factorization.

402869808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 402869808 is about 20071.6169752215. The cubic root of 402869808 is about 738.5641796031.

The spelling of 402869808 in words is "four hundred two million, eight hundred sixty-nine thousand, eight hundred eight".