280140872 has 64 divisors (see below), whose sum is σ = 592954560. Its totient is φ = 122976000.

The previous prime is 280140871. The next prime is 280140953. The reversal of 280140872 is 278041082.

280140872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (280140871) 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, 381818 + ... + 382550.

It is an arithmetic number, because the mean of its divisors is an integer number (9264915).

Almost surely, 2^280140872 is an apocalyptic number.

280140872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280140872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296477280).

280140872 is an abundant number, since it is smaller than the sum of its proper divisors (312813688).

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

280140872 is a wasteful number, since it uses less digits than its factorization.

280140872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 280140872 is about 16737.4093574842. The cubic root of 280140872 is about 654.3229583225.

The spelling of 280140872 in words is "two hundred eighty million, one hundred forty thousand, eight hundred seventy-two".