280225828 has 12 divisors (see below), whose sum is σ = 493975692. Its totient is φ = 139089920.

The previous prime is 280225801. The next prime is 280225843. The reversal of 280225828 is 828522082.

It can be written as a sum of positive squares in 2 ways, for example, as 132894784 + 147331044 = 11528^2 + 12138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255133 + ... + 256228.

It is an arithmetic number, because the mean of its divisors is an integer number (41164641).

Almost surely, 2^280225828 is an apocalyptic number.

It is an amenable number.

280225828 is a deficient number, since it is larger than the sum of its proper divisors (213749864).

280225828 is a wasteful number, since it uses less digits than its factorization.

280225828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511502 (or 511500 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 37.

The square root of 280225828 is about 16739.9470727957. The cubic root of 280225828 is about 654.3890953372.

The spelling of 280225828 in words is "two hundred eighty million, two hundred twenty-five thousand, eight hundred twenty-eight".