402320438 has 8 divisors (see below), whose sum is σ = 649902288. Its totient is φ = 185686344.

The previous prime is 402320389. The next prime is 402320473. The reversal of 402320438 is 834023204.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 15473863 = 402320438 / (4 + 0 + 2 + 3 + 2 + 0 + 4 + 3 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7736906 + ... + 7736957.

It is an arithmetic number, because the mean of its divisors is an integer number (81237786).

Almost surely, 2^402320438 is an apocalyptic number.

402320438 is a deficient number, since it is larger than the sum of its proper divisors (247581850).

402320438 is a wasteful number, since it uses less digits than its factorization.

402320438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15473878.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 402320438 is about 20057.9270613890. The cubic root of 402320438 is about 738.2283146286.

The spelling of 402320438 in words is "four hundred two million, three hundred twenty thousand, four hundred thirty-eight".