402723990 has 24 divisors (see below), whose sum is σ = 1047082608. Its totient is φ = 107393040.

The previous prime is 402723989. The next prime is 402724001. The reversal of 402723990 is 99327204.

It is a super-2 number, since 2×402723990² = 324373224243040200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2237266 + ... + 2237445.

It is an arithmetic number, because the mean of its divisors is an integer number (43628442).

Almost surely, 2^402723990 is an apocalyptic number.

402723990 is an abundant number, since it is smaller than the sum of its proper divisors (644358618).

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

402723990 is a wasteful number, since it uses less digits than its factorization.

402723990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474724 (or 4474721 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 402723990 is about 20067.9842037012. The cubic root of 402723990 is about 738.4750615262.

The spelling of 402723990 in words is "four hundred two million, seven hundred twenty-three thousand, nine hundred ninety".