321402344 has 8 divisors (see below), whose sum is σ = 602629410. Its totient is φ = 160701168.

The previous prime is 321402317. The next prime is 321402353. The reversal of 321402344 is 443204123.

It can be written as a sum of positive squares in only one way, i.e., 320052100 + 1350244 = 17890^2 + 1162^2 .

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

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 as a sum of consecutive naturals, namely, 20087639 + ... + 20087654.

Almost surely, 2^321402344 is an apocalyptic number.

It is an amenable number.

321402344 is a deficient number, since it is larger than the sum of its proper divisors (281227066).

321402344 is a wasteful number, since it uses less digits than its factorization.

321402344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40175299 (or 40175295 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 321402344 is about 17927.6976770583. The cubic root of 321402344 is about 684.9880787170.

Adding to 321402344 its reverse (443204123), we get a palindrome (764606467).

The spelling of 321402344 in words is "three hundred twenty-one million, four hundred two thousand, three hundred forty-four".