402089568 has 24 divisors (see below), whose sum is σ = 1055485368. Its totient is φ = 134029824.

The previous prime is 402089551. The next prime is 402089573. The reversal of 402089568 is 865980204.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094121 + ... + 2094312.

It is an arithmetic number, because the mean of its divisors is an integer number (43978557).

Almost surely, 2^402089568 is an apocalyptic number.

402089568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

402089568 is an abundant number, since it is smaller than the sum of its proper divisors (653395800).

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

402089568 is a wasteful number, since it uses less digits than its factorization.

402089568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188446 (or 4188438 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 402089568 is about 20052.1711542666. The cubic root of 402089568 is about 738.0870778047.

The spelling of 402089568 in words is "four hundred two million, eighty-nine thousand, five hundred sixty-eight".