280047960 has 48 divisors (see below), whose sum is σ = 910157040. Its totient is φ = 74679360.

The previous prime is 280047959. The next prime is 280047967. The reversal of 280047960 is 69740082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280047967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388596 + ... + 389315.

It is an arithmetic number, because the mean of its divisors is an integer number (18961605).

Almost surely, 2^280047960 is an apocalyptic number.

280047960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280047960 is an abundant number, since it is smaller than the sum of its proper divisors (630109080).

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

280047960 is a wasteful number, since it uses less digits than its factorization.

280047960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777928 (or 777921 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 280047960 is about 16734.6335484229. The cubic root of 280047960 is about 654.2506123672.

The spelling of 280047960 in words is "two hundred eighty million, forty-seven thousand, nine hundred sixty".