280493960 has 32 divisors (see below), whose sum is σ = 664329600. Its totient is φ = 106292160.

The previous prime is 280493957. The next prime is 280493977. The reversal of 280493960 is 69394082.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183776 + ... + 185295.

It is an arithmetic number, because the mean of its divisors is an integer number (20760300).

Almost surely, 2^280493960 is an apocalyptic number.

280493960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280493960 is an abundant number, since it is smaller than the sum of its proper divisors (383835640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280493960 is a wasteful number, since it uses less digits than its factorization.

280493960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369101 (or 369097 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 280493960 is about 16747.9539048804. The cubic root of 280493960 is about 654.5977445833.

Subtracting from 280493960 its reverse (69394082), we obtain a triangular number (211099878 = T₂₀₅₄₇).

The spelling of 280493960 in words is "two hundred eighty million, four hundred ninety-three thousand, nine hundred sixty".