280530120 has 64 divisors (see below), whose sum is σ = 906333120. Its totient is φ = 69053184.

The previous prime is 280530109. The next prime is 280530121. The reversal of 280530120 is 21035082.

It is not an unprimeable number, because it can be changed into a prime (280530121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88354 + ... + 91473.

It is an arithmetic number, because the mean of its divisors is an integer number (14161455).

Almost surely, 2^280530120 is an apocalyptic number.

280530120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280530120 is an abundant number, since it is smaller than the sum of its proper divisors (625803000).

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

280530120 is a wasteful number, since it uses less digits than its factorization.

280530120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179854 (or 179850 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 280530120 is about 16749.0334049461. The cubic root of 280530120 is about 654.6258726250.

The spelling of 280530120 in words is "two hundred eighty million, five hundred thirty thousand, one hundred twenty".