280142972 has 12 divisors (see below), whose sum is σ = 490395696. Its totient is φ = 140029920.

The previous prime is 280142969. The next prime is 280143007. The reversal of 280142972 is 279241082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8648 + ... + 25200.

It is an arithmetic number, because the mean of its divisors is an integer number (40866308).

Almost surely, 2^280142972 is an apocalyptic number.

It is an amenable number.

280142972 is a deficient number, since it is larger than the sum of its proper divisors (210252724).

280142972 is a wasteful number, since it uses less digits than its factorization.

280142972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20788 (or 20786 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 280142972 is about 16737.4720910895. The cubic root of 280142972 is about 654.3245933033.

The spelling of 280142972 in words is "two hundred eighty million, one hundred forty-two thousand, nine hundred seventy-two".