402390912 has 256 divisors, whose sum is σ = 1378713600. Its totient is φ = 100915200.

The previous prime is 402390899. The next prime is 402390917. The reversal of 402390912 is 219093204.

It is a self number, because there is not a number n which added to its sum of digits gives 402390912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402390917) 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, 916389 + ... + 916827.

It is an arithmetic number, because the mean of its divisors is an integer number (5385600).

Almost surely, 2^402390912 is an apocalyptic number.

402390912 is a gapful number since it is divisible by the number (42) 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 402390912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689356800).

402390912 is an abundant number, since it is smaller than the sum of its proper divisors (976322688).

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

402390912 is a wasteful number, since it uses less digits than its factorization.

402390912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 402390912 is about 20059.6837462608. The cubic root of 402390912 is about 738.2714169751.

The spelling of 402390912 in words is "four hundred two million, three hundred ninety thousand, nine hundred twelve".