280787012 has 12 divisors (see below), whose sum is σ = 536048016. Its totient is φ = 127630440.

The previous prime is 280787009. The next prime is 280787021. The reversal of 280787012 is 210787082.

It is a super-2 number, since 2×280787012² = 157682692215776288, which contains 22 as substring.

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, 3190718 + ... + 3190805.

It is an arithmetic number, because the mean of its divisors is an integer number (44670668).

Almost surely, 2^280787012 is an apocalyptic number.

280787012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

280787012 is a deficient number, since it is larger than the sum of its proper divisors (255261004).

280787012 is a wasteful number, since it uses less digits than its factorization.

280787012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381538 (or 6381536 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 280787012 is about 16756.7005105420. The cubic root of 280787012 is about 654.8256335195.

The spelling of 280787012 in words is "two hundred eighty million, seven hundred eighty-seven thousand, twelve".