280420964 has 12 divisors (see below), whose sum is σ = 490854000. Its totient is φ = 140176968.

The previous prime is 280420949. The next prime is 280420969. The reversal of 280420964 is 469024082.

It is not an unprimeable number, because it can be changed into a prime (280420969) by changing a digit.

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, 27887 + ... + 36585.

It is an arithmetic number, because the mean of its divisors is an integer number (40904500).

Almost surely, 2^280420964 is an apocalyptic number.

It is an amenable number.

280420964 is a deficient number, since it is larger than the sum of its proper divisors (210433036).

280420964 is a wasteful number, since it uses less digits than its factorization.

280420964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16762 (or 16760 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 280420964 is about 16745.7745117985. The cubic root of 280420964 is about 654.5409552885.

The spelling of 280420964 in words is "two hundred eighty million, four hundred twenty thousand, nine hundred sixty-four".