280488140 has 24 divisors (see below), whose sum is σ = 602725200. Its totient is φ = 109585728.

The previous prime is 280488121. The next prime is 280488149. The reversal of 280488140 is 41884082.

It is a self number, because there is not a number n which added to its sum of digits gives 280488140.

It is not an unprimeable number, because it can be changed into a prime (280488149) 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, 162215 + ... + 163934.

It is an arithmetic number, because the mean of its divisors is an integer number (25113550).

Almost surely, 2^280488140 is an apocalyptic number.

280488140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280488140 is an abundant number, since it is smaller than the sum of its proper divisors (322237060).

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

280488140 is a wasteful number, since it uses less digits than its factorization.

280488140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326201 (or 326199 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 280488140 is about 16747.7801514111. The cubic root of 280488140 is about 654.5932171118.

The spelling of 280488140 in words is "two hundred eighty million, four hundred eighty-eight thousand, one hundred forty".