402990472 has 8 divisors (see below), whose sum is σ = 755607150. Its totient is φ = 201495232.

The previous prime is 402990451. The next prime is 402990479. The reversal of 402990472 is 274099204.

It can be written as a sum of positive squares in only one way, i.e., 206037316 + 196953156 = 14354^2 + 14034^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (402990479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25186897 + ... + 25186912.

Almost surely, 2^402990472 is an apocalyptic number.

It is an amenable number.

402990472 is a deficient number, since it is larger than the sum of its proper divisors (352616678).

402990472 is a wasteful number, since it uses less digits than its factorization.

402990472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50373815 (or 50373811 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 402990472 is about 20074.6225867387. The cubic root of 402990472 is about 738.6379083120.

The spelling of 402990472 in words is "four hundred two million, nine hundred ninety thousand, four hundred seventy-two".