402399658 has 8 divisors (see below), whose sum is σ = 603692100. Its totient is φ = 201168960.

The previous prime is 402399619. The next prime is 402399659. The reversal of 402399658 is 856993204.

It can be written as a sum of positive squares in 2 ways, for example, as 384277609 + 18122049 = 19603^2 + 4257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (402399659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7938 + ... + 29458.

Almost surely, 2^402399658 is an apocalyptic number.

402399658 is a deficient number, since it is larger than the sum of its proper divisors (201292442).

402399658 is a wasteful number, since it uses less digits than its factorization.

402399658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30872.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 402399658 is about 20059.9017445251. The cubic root of 402399658 is about 738.2767657332.

The spelling of 402399658 in words is "four hundred two million, three hundred ninety-nine thousand, six hundred fifty-eight".