321384628 has 6 divisors (see below), whose sum is σ = 562423106. Its totient is φ = 160692312.

The previous prime is 321384619. The next prime is 321384629. The reversal of 321384628 is 826483123.

It can be written as a sum of positive squares in only one way, i.e., 305480484 + 15904144 = 17478^2 + 3988^2 .

It is a super-2 number, since 2×321384628² = 206576158229396768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321384629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40173075 + ... + 40173082.

Almost surely, 2^321384628 is an apocalyptic number.

It is an amenable number.

321384628 is a deficient number, since it is larger than the sum of its proper divisors (241038478).

321384628 is a wasteful number, since it uses less digits than its factorization.

321384628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80346161 (or 80346159 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 321384628 is about 17927.2035744563. The cubic root of 321384628 is about 684.9754927563.

The spelling of 321384628 in words is "three hundred twenty-one million, three hundred eighty-four thousand, six hundred twenty-eight".