280431479 has 16 divisors (see below), whose sum is σ = 303652800. Its totient is φ = 258187776.

The previous prime is 280431467. The next prime is 280431491. The reversal of 280431479 is 974134082.

It is an interprime number because it is at equal distance from previous prime (280431467) and next prime (280431491).

It is a cyclic number.

It is not a de Polignac number, because 280431479 - 2²⁰ = 279382903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280431409) 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, 395177 + ... + 395885.

It is an arithmetic number, because the mean of its divisors is an integer number (18978300).

Almost surely, 2^280431479 is an apocalyptic number.

280431479 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

280431479 is a deficient number, since it is larger than the sum of its proper divisors (23221321).

280431479 is a wasteful number, since it uses less digits than its factorization.

280431479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 280431479 is about 16746.0884686544. The cubic root of 280431479 is about 654.5491363365.

The spelling of 280431479 in words is "two hundred eighty million, four hundred thirty-one thousand, four hundred seventy-nine".