280222820 has 12 divisors (see below), whose sum is σ = 588467964. Its totient is φ = 112089120.

The previous prime is 280222807. The next prime is 280222829. The reversal of 280222820 is 28222082.

It can be written as a sum of positive squares in 2 ways, for example, as 177848896 + 102373924 = 13336^2 + 10118^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 280222820.

It is not an unprimeable number, because it can be changed into a prime (280222829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7005551 + ... + 7005590.

It is an arithmetic number, because the mean of its divisors is an integer number (49038997).

Almost surely, 2^280222820 is an apocalyptic number.

280222820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280222820 is an abundant number, since it is smaller than the sum of its proper divisors (308245144).

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

280222820 is a wasteful number, since it uses less digits than its factorization.

280222820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14011150 (or 14011148 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 280222820 is about 16739.8572275871. The cubic root of 280222820 is about 654.3867538811.

The spelling of 280222820 in words is "two hundred eighty million, two hundred twenty-two thousand, eight hundred twenty".