321402398 has 8 divisors (see below), whose sum is σ = 482503392. Its totient is φ = 160567936.

The previous prime is 321402383. The next prime is 321402421. The reversal of 321402398 is 893204123.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63590 + ... + 68457.

It is an arithmetic number, because the mean of its divisors is an integer number (60312924).

Almost surely, 2^321402398 is an apocalyptic number.

321402398 is a deficient number, since it is larger than the sum of its proper divisors (161100994).

321402398 is a wasteful number, since it uses less digits than its factorization.

321402398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133266.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 321402398 is about 17927.6991831077. The cubic root of 321402398 is about 684.9881170795.

The spelling of 321402398 in words is "three hundred twenty-one million, four hundred two thousand, three hundred ninety-eight".