280485812 has 12 divisors (see below), whose sum is σ = 491257536. Its totient is φ = 140126520.

The previous prime is 280485811. The next prime is 280485817. The reversal of 280485812 is 218584082.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280485811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23558 + ... + 33405.

It is an arithmetic number, because the mean of its divisors is an integer number (40938128).

Almost surely, 2^280485812 is an apocalyptic number.

It is an amenable number.

280485812 is a deficient number, since it is larger than the sum of its proper divisors (210771724).

280485812 is a wasteful number, since it uses less digits than its factorization.

280485812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58198 (or 58196 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 280485812 is about 16747.7106495186. The cubic root of 280485812 is about 654.5914061057.

The spelling of 280485812 in words is "two hundred eighty million, four hundred eighty-five thousand, eight hundred twelve".