280325280 has 48 divisors (see below), whose sum is σ = 883026144. Its totient is φ = 74753280.

The previous prime is 280325263. The next prime is 280325293. The reversal of 280325280 is 82523082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 291526 + ... + 292485.

It is an arithmetic number, because the mean of its divisors is an integer number (18396378).

Almost surely, 2^280325280 is an apocalyptic number.

280325280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280325280 is an abundant number, since it is smaller than the sum of its proper divisors (602700864).

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

280325280 is a wasteful number, since it uses less digits than its factorization.

280325280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584029 (or 584021 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 280325280 is about 16742.9173085218. The cubic root of 280325280 is about 654.4665002970.

The spelling of 280325280 in words is "two hundred eighty million, three hundred twenty-five thousand, two hundred eighty".