320472780 has 48 divisors (see below), whose sum is σ = 950110560. Its totient is φ = 80432128.

The previous prime is 320472773. The next prime is 320472781. The reversal of 320472780 is 87274023.

It is not an unprimeable number, because it can be changed into a prime (320472781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156075 + ... + 158114.

It is an arithmetic number, because the mean of its divisors is an integer number (19793970).

Almost surely, 2^320472780 is an apocalyptic number.

320472780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320472780 is an abundant number, since it is smaller than the sum of its proper divisors (629637780).

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

320472780 is a wasteful number, since it uses less digits than its factorization.

320472780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314218 (or 314216 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 320472780 is about 17901.7535453933. The cubic root of 320472780 is about 684.3270639263.

The spelling of 320472780 in words is "three hundred twenty million, four hundred seventy-two thousand, seven hundred eighty".