320427628 has 96 divisors (see below), whose sum is σ = 670602240. Its totient is φ = 132802560.

The previous prime is 320427617. The next prime is 320427637. The reversal of 320427628 is 826724023.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 320427593 and 320427602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1218225 + ... + 1218487.

It is an arithmetic number, because the mean of its divisors is an integer number (6985440).

Almost surely, 2^320427628 is an apocalyptic number.

320427628 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

320427628 is an abundant number, since it is smaller than the sum of its proper divisors (350174612).

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

320427628 is a wasteful number, since it uses less digits than its factorization.

320427628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 320427628 is about 17900.4923954622. The cubic root of 320427628 is about 684.2949237168.

The spelling of 320427628 in words is "three hundred twenty million, four hundred twenty-seven thousand, six hundred twenty-eight".