321072480 has 72 divisors (see below), whose sum is σ = 1095664752. Its totient is φ = 85618944.

The previous prime is 321072473. The next prime is 321072533. The reversal of 321072480 is 84270123.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110044 + ... + 112923.

It is an arithmetic number, because the mean of its divisors is an integer number (15217566).

Almost surely, 2^321072480 is an apocalyptic number.

321072480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321072480 is an abundant number, since it is smaller than the sum of its proper divisors (774592272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321072480 is a wasteful number, since it uses less digits than its factorization.

321072480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222988 (or 222977 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 321072480 is about 17918.4954725557. The cubic root of 321072480 is about 684.7536578460.

The spelling of 321072480 in words is "three hundred twenty-one million, seventy-two thousand, four hundred eighty".