280628980 has 24 divisors (see below), whose sum is σ = 614944512. Its totient is φ = 107370912.

The previous prime is 280628947. The next prime is 280628981. The reversal of 280628980 is 89826082.

280628980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280628981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304572 + ... + 305491.

It is an arithmetic number, because the mean of its divisors is an integer number (25622688).

Almost surely, 2^280628980 is an apocalyptic number.

280628980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280628980 is an abundant number, since it is smaller than the sum of its proper divisors (334315532).

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

280628980 is a wasteful number, since it uses less digits than its factorization.

280628980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610095 (or 610093 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 280628980 is about 16751.9843600691. The cubic root of 280628980 is about 654.7027612352.

The spelling of 280628980 in words is "two hundred eighty million, six hundred twenty-eight thousand, nine hundred eighty".