280972269 has 24 divisors (see below), whose sum is σ = 413337600. Its totient is φ = 183886560.

The previous prime is 280972267. The next prime is 280972291. The reversal of 280972269 is 962279082.

It is not a de Polignac number, because 280972269 - 2¹ = 280972267 is a prime.

It is a super-2 number, since 2×280972269² = 157890831894016722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280972261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134767 + ... + 136835.

It is an arithmetic number, because the mean of its divisors is an integer number (17222400).

Almost surely, 2^280972269 is an apocalyptic number.

It is an amenable number.

280972269 is a deficient number, since it is larger than the sum of its proper divisors (132365331).

280972269 is a wasteful number, since it uses less digits than its factorization.

280972269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 280972269 is about 16762.2274474486. The cubic root of 280972269 is about 654.9696149687.

It can be divided in two parts, 2809 and 72269, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 280972269 in words is "two hundred eighty million, nine hundred seventy-two thousand, two hundred sixty-nine".