280018972 has 12 divisors (see below), whose sum is σ = 494370576. Its totient is φ = 138770240.

The previous prime is 280018969. The next prime is 280019027. The reversal of 280018972 is 279810082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309304 + ... + 310207.

It is an arithmetic number, because the mean of its divisors is an integer number (41197548).

Almost surely, 2^280018972 is an apocalyptic number.

It is an amenable number.

280018972 is a deficient number, since it is larger than the sum of its proper divisors (214351604).

280018972 is a wasteful number, since it uses less digits than its factorization.

280018972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619628 (or 619626 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 280018972 is about 16733.7674180084. The cubic root of 280018972 is about 654.2280375778.

The spelling of 280018972 in words is "two hundred eighty million, eighteen thousand, nine hundred seventy-two".