280231983 has 12 divisors (see below), whose sum is σ = 407018248. Its totient is φ = 185788080.

The previous prime is 280231951. The next prime is 280232009. The reversal of 280231983 is 389132082.

It is a happy number.

It is not a de Polignac number, because 280231983 - 2⁵ = 280231951 is a prime.

It is a super-2 number, since 2×280231983² = 157059928592224578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280231583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84385 + ... + 87642.

Almost surely, 2^280231983 is an apocalyptic number.

280231983 is a deficient number, since it is larger than the sum of its proper divisors (126786265).

280231983 is a wasteful number, since it uses less digits than its factorization.

280231983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172214 (or 172211 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 280231983 is about 16740.1309134666. The cubic root of 280231983 is about 654.3938863962.

The spelling of 280231983 in words is "two hundred eighty million, two hundred thirty-one thousand, nine hundred eighty-three".