402893864 has 8 divisors (see below), whose sum is σ = 755426010. Its totient is φ = 201446928.

The previous prime is 402893791. The next prime is 402893867. The reversal of 402893864 is 468398204.

It can be written as a sum of positive squares in only one way, i.e., 394816900 + 8076964 = 19870^2 + 2842^2 .

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

It is not an unprimeable number, because it can be changed into a prime (402893867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25180859 + ... + 25180874.

Almost surely, 2^402893864 is an apocalyptic number.

It is an amenable number.

402893864 is a deficient number, since it is larger than the sum of its proper divisors (352532146).

402893864 is a wasteful number, since it uses less digits than its factorization.

402893864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50361739 (or 50361735 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 402893864 is about 20072.2162204376. The cubic root of 402893864 is about 738.5788795930.

The spelling of 402893864 in words is "four hundred two million, eight hundred ninety-three thousand, eight hundred sixty-four".