280873164 has 48 divisors (see below), whose sum is σ = 769950720. Its totient is φ = 78565440.

The previous prime is 280873141. The next prime is 280873169. The reversal of 280873164 is 461378082.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (280873169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80124 + ... + 83555.

It is an arithmetic number, because the mean of its divisors is an integer number (16040640).

Almost surely, 2^280873164 is an apocalyptic number.

It is an amenable number.

280873164 is an abundant number, since it is smaller than the sum of its proper divisors (489077556).

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

280873164 is a wasteful number, since it uses less digits than its factorization.

280873164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163710 (or 163708 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 280873164 is about 16759.2709865316. The cubic root of 280873164 is about 654.8925985936.

The spelling of 280873164 in words is "two hundred eighty million, eight hundred seventy-three thousand, one hundred sixty-four".