280484240 has 40 divisors (see below), whose sum is σ = 654654528. Its totient is φ = 111758720.

The previous prime is 280484233. The next prime is 280484257. The reversal of 280484240 is 42484082.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 280484197 and 280484206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14375 + ... + 27705.

Almost surely, 2^280484240 is an apocalyptic number.

280484240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280484240 is an abundant number, since it is smaller than the sum of its proper divisors (374170288).

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

280484240 is a wasteful number, since it uses less digits than its factorization.

280484240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607 (or 13601 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 280484240 is about 16747.6637176652. The cubic root of 280484240 is about 654.5901832041.

The spelling of 280484240 in words is "two hundred eighty million, four hundred eighty-four thousand, two hundred forty".