280463904 has 192 divisors, whose sum is σ = 948326400. Its totient is φ = 78983424.

The previous prime is 280463881. The next prime is 280463917. The reversal of 280463904 is 409364082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 477499 + ... + 478085.

It is an arithmetic number, because the mean of its divisors is an integer number (4939200).

Almost surely, 2^280463904 is an apocalyptic number.

280463904 is a gapful number since it is divisible by the number (24) 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 280463904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474163200).

280463904 is an abundant number, since it is smaller than the sum of its proper divisors (667862496).

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

280463904 is a wasteful number, since it uses less digits than its factorization.

280463904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 280463904 is about 16747.0565772019. The cubic root of 280463904 is about 654.5743628646.

The spelling of 280463904 in words is "two hundred eighty million, four hundred sixty-three thousand, nine hundred four".