320667028 has 24 divisors (see below), whose sum is σ = 644404320. Its totient is φ = 138085920.

The previous prime is 320666987. The next prime is 320667031. The reversal of 320667028 is 820766023.

It is a junction number, because it is equal to n+sod(n) for n = 320666984 and 320667002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190951 + ... + 192622.

It is an arithmetic number, because the mean of its divisors is an integer number (26850180).

Almost surely, 2^320667028 is an apocalyptic number.

320667028 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

320667028 is an abundant number, since it is smaller than the sum of its proper divisors (323737292).

320667028 is a wasteful number, since it uses less digits than its factorization.

320667028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383607 (or 383605 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 320667028 is about 17907.1781138179. The cubic root of 320667028 is about 684.4652996033.

The spelling of 320667028 in words is "three hundred twenty million, six hundred sixty-seven thousand, twenty-eight".