402390502 has 8 divisors (see below), whose sum is σ = 613816200. Its totient is φ = 197785104.

The previous prime is 402390487. The next prime is 402390539. The reversal of 402390502 is 205093204.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1704927 + ... + 1705162.

It is an arithmetic number, because the mean of its divisors is an integer number (76727025).

Almost surely, 2^402390502 is an apocalyptic number.

402390502 is a deficient number, since it is larger than the sum of its proper divisors (211425698).

402390502 is a wasteful number, since it uses less digits than its factorization.

402390502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410150.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 402390502 is about 20059.6735267551. The cubic root of 402390502 is about 738.2711662310.

The spelling of 402390502 in words is "four hundred two million, three hundred ninety thousand, five hundred two".