280723968 has 200 divisors, whose sum is σ = 958575552. Its totient is φ = 80123904.

The previous prime is 280723951. The next prime is 280723981. The reversal of 280723968 is 869327082.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 289821 + ... + 290787.

Almost surely, 2^280723968 is an apocalyptic number.

280723968 is a gapful number since it is divisible by the number (28) 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 280723968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479287776).

280723968 is an abundant number, since it is smaller than the sum of its proper divisors (677851584).

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

280723968 is an frugal number, since it uses more digits than its factorization.

280723968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 280723968 is about 16754.8192470107. The cubic root of 280723968 is about 654.7766213791.

The spelling of 280723968 in words is "two hundred eighty million, seven hundred twenty-three thousand, nine hundred sixty-eight".