280740072 has 16 divisors (see below), whose sum is σ = 701850240. Its totient is φ = 93580016.

The previous prime is 280740041. The next prime is 280740121. The reversal of 280740072 is 270047082.

280740072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5848728 + ... + 5848775.

It is an arithmetic number, because the mean of its divisors is an integer number (43865640).

Almost surely, 2^280740072 is an apocalyptic number.

It is an amenable number.

280740072 is an abundant number, since it is smaller than the sum of its proper divisors (421110168).

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

280740072 is a wasteful number, since it uses less digits than its factorization.

280740072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11697512 (or 11697508 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 280740072 is about 16755.2998182665. The cubic root of 280740072 is about 654.7891417696.

The spelling of 280740072 in words is "two hundred eighty million, seven hundred forty thousand, seventy-two".