280253260 has 24 divisors (see below), whose sum is σ = 672608160. Its totient is φ = 96086784.

The previous prime is 280253227. The next prime is 280253263. The reversal of 280253260 is 62352082.

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

It is not an unprimeable number, because it can be changed into a prime (280253263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000765 + ... + 1001044.

It is an arithmetic number, because the mean of its divisors is an integer number (28025340).

Almost surely, 2^280253260 is an apocalyptic number.

280253260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280253260 is an abundant number, since it is smaller than the sum of its proper divisors (392354900).

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

280253260 is a wasteful number, since it uses less digits than its factorization.

280253260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001825 (or 2001823 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 280253260 is about 16740.7664101737. The cubic root of 280253260 is about 654.4104478966.

The spelling of 280253260 in words is "two hundred eighty million, two hundred fifty-three thousand, two hundred sixty".