280875066 has 32 divisors (see below), whose sum is σ = 595557888. Its totient is φ = 88153920.

The previous prime is 280875061. The next prime is 280875073. The reversal of 280875066 is 660578082.

It is not an unprimeable number, because it can be changed into a prime (280875061) 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, 13525 + ... + 27288.

It is an arithmetic number, because the mean of its divisors is an integer number (18611184).

Almost surely, 2^280875066 is an apocalyptic number.

280875066 is an abundant number, since it is smaller than the sum of its proper divisors (314682822).

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

280875066 is a wasteful number, since it uses less digits than its factorization.

280875066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40886.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 280875066 is about 16759.3277311472. The cubic root of 280875066 is about 654.8940768444.

It can be divided in two parts, 28087 and 5066, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 280875066 in words is "two hundred eighty million, eight hundred seventy-five thousand, sixty-six".