280740476 has 12 divisors (see below), whose sum is σ = 491778672. Its totient is φ = 140232288.

The previous prime is 280740457. The next prime is 280740479. The reversal of 280740476 is 674047082.

280740476 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 (280740479) 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, 29840 + ... + 38103.

It is an arithmetic number, because the mean of its divisors is an integer number (40981556).

Almost surely, 2^280740476 is an apocalyptic number.

It is an amenable number.

280740476 is a deficient number, since it is larger than the sum of its proper divisors (211038196).

280740476 is a wasteful number, since it uses less digits than its factorization.

280740476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68980 (or 68978 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 280740476 is about 16755.3118741490. The cubic root of 280740476 is about 654.7894558617.

The spelling of 280740476 in words is "two hundred eighty million, seven hundred forty thousand, four hundred seventy-six".