320264560 has 80 divisors (see below), whose sum is σ = 928369152. Its totient is φ = 99820800.

The previous prime is 320264557. The next prime is 320264569. The reversal of 320264560 is 65462023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320264569) 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, 19836 + ... + 32155.

Almost surely, 2^320264560 is an apocalyptic number.

It is an amenable number.

320264560 is an abundant number, since it is smaller than the sum of its proper divisors (608104592).

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

320264560 is a wasteful number, since it uses less digits than its factorization.

320264560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52022 (or 52016 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 320264560 is about 17895.9369690441. The cubic root of 320264560 is about 684.1788230966.

The spelling of 320264560 in words is "three hundred twenty million, two hundred sixty-four thousand, five hundred sixty".