402999057 has 10 divisors (see below), whose sum is σ = 602011058. Its totient is φ = 268665984.

The previous prime is 402999049. The next prime is 402999071. The reversal of 402999057 is 750999204.

It can be written as a sum of positive squares in only one way, i.e., 390615696 + 12383361 = 19764^2 + 3519^2 .

It is not a de Polignac number, because 402999057 - 2³ = 402999049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402999017) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2487568 + ... + 2487729.

Almost surely, 2^402999057 is an apocalyptic number.

It is an amenable number.

402999057 is a deficient number, since it is larger than the sum of its proper divisors (199012001).

402999057 is an equidigital number, since it uses as much as digits as its factorization.

402999057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975309 (or 4975300 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 402999057 is about 20074.8364127830. The cubic root of 402999057 is about 738.6431533999.

The spelling of 402999057 in words is "four hundred two million, nine hundred ninety-nine thousand, fifty-seven".