280030056 has 32 divisors (see below), whose sum is σ = 736922400. Its totient is φ = 88430400.

The previous prime is 280030043. The next prime is 280030057. The reversal of 280030056 is 650030082.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (280030057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306595 + ... + 307506.

It is an arithmetic number, because the mean of its divisors is an integer number (23028825).

Almost surely, 2^280030056 is an apocalyptic number.

It is an amenable number.

280030056 is an abundant number, since it is smaller than the sum of its proper divisors (456892344).

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

280030056 is a wasteful number, since it uses less digits than its factorization.

280030056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614129 (or 614125 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 280030056 is about 16734.0986013588. The cubic root of 280030056 is about 654.2366695738.

The spelling of 280030056 in words is "two hundred eighty million, thirty thousand, fifty-six".