280422828 has 36 divisors (see below), whose sum is σ = 810111120. Its totient is φ = 80120736.

The previous prime is 280422817. The next prime is 280422833. The reversal of 280422828 is 828224082.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 280422792 and 280422801.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556143 + ... + 556646.

Almost surely, 2^280422828 is an apocalyptic number.

280422828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

280422828 is an abundant number, since it is smaller than the sum of its proper divisors (529688292).

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

280422828 is a wasteful number, since it uses less digits than its factorization.

280422828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112806 (or 1112801 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 280422828 is about 16745.8301675372. The cubic root of 280422828 is about 654.5424055624.

The spelling of 280422828 in words is "two hundred eighty million, four hundred twenty-two thousand, eight hundred twenty-eight".