280555842 has 16 divisors (see below), whose sum is σ = 641270592. Its totient is φ = 80158800.

The previous prime is 280555837. The next prime is 280555901. The reversal of 280555842 is 248555082.

280555842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 280555842.

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, 3339909 + ... + 3339992.

It is an arithmetic number, because the mean of its divisors is an integer number (40079412).

Almost surely, 2^280555842 is an apocalyptic number.

280555842 is an abundant number, since it is smaller than the sum of its proper divisors (360714750).

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

280555842 is a wasteful number, since it uses less digits than its factorization.

280555842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679913.

The product of its (nonzero) digits is 128000, while the sum is 39.

The square root of 280555842 is about 16749.8012525522. The cubic root of 280555842 is about 654.6458797126.

The spelling of 280555842 in words is "two hundred eighty million, five hundred fifty-five thousand, eight hundred forty-two".