280788828 has 48 divisors (see below), whose sum is σ = 674793504. Its totient is φ = 90818560.

The previous prime is 280788803. The next prime is 280788877. The reversal of 280788828 is 828887082.

280788828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×280788828² = 157684731859227168, which contains 22 as substring.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 95476 + ... + 98372.

It is an arithmetic number, because the mean of its divisors is an integer number (14058198).

Almost surely, 2^280788828 is an apocalyptic number.

It is an amenable number.

280788828 is an abundant number, since it is smaller than the sum of its proper divisors (394004676).

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

280788828 is a wasteful number, since it uses less digits than its factorization.

280788828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142 (or 3140 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 51.

The square root of 280788828 is about 16756.7546977331. The cubic root of 280788828 is about 654.8270452191.

The spelling of 280788828 in words is "two hundred eighty million, seven hundred eighty-eight thousand, eight hundred twenty-eight".