321472730 has 16 divisors (see below), whose sum is σ = 592108704. Its totient is φ = 125598480.

The previous prime is 321472709. The next prime is 321472747. The reversal of 321472730 is 37274123.

It is a super-2 number, since 2×321472730² = 206689432267305800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321472693 and 321472702.

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 7 ways as a sum of consecutive naturals, for example, 373376 + ... + 374235.

It is an arithmetic number, because the mean of its divisors is an integer number (37006794).

Almost surely, 2^321472730 is an apocalyptic number.

321472730 is a deficient number, since it is larger than the sum of its proper divisors (270635974).

321472730 is a wasteful number, since it uses less digits than its factorization.

321472730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747661.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 321472730 is about 17929.6606214395. The cubic root of 321472730 is about 685.0380784061.

The spelling of 321472730 in words is "three hundred twenty-one million, four hundred seventy-two thousand, seven hundred thirty".