280283969 has 12 divisors (see below), whose sum is σ = 326473200. Its totient is φ = 239927688.

The previous prime is 280283963. The next prime is 280283977. The reversal of 280283969 is 969382082.

It is not a de Polignac number, because 280283969 - 2¹² = 280279873 is a prime.

It is a super-2 number, since 2×280283969² = 157118206556785922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (280283963) 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, 38762 + ... + 45420.

It is an arithmetic number, because the mean of its divisors is an integer number (27206100).

Almost surely, 2^280283969 is an apocalyptic number.

It is an amenable number.

280283969 is a deficient number, since it is larger than the sum of its proper divisors (46189231).

280283969 is an equidigital number, since it uses as much as digits as its factorization.

280283969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532 (or 7525 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 280283969 is about 16741.6835772272. The cubic root of 280283969 is about 654.4343495591.

The spelling of 280283969 in words is "two hundred eighty million, two hundred eighty-three thousand, nine hundred sixty-nine".