280875648 has 32 divisors (see below), whose sum is σ = 746076960. Its totient is φ = 93625088.

The previous prime is 280875629. The next prime is 280875653. The reversal of 280875648 is 846578082.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×280875648² = 157782259278839808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 280875597 and 280875606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365340 + ... + 366107.

It is an arithmetic number, because the mean of its divisors is an integer number (23314905).

Almost surely, 2^280875648 is an apocalyptic number.

It is an amenable number.

280875648 is an abundant number, since it is smaller than the sum of its proper divisors (465201312).

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

280875648 is an equidigital number, since it uses as much as digits as its factorization.

280875648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731464 (or 731452 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 280875648 is about 16759.3450946032. The cubic root of 280875648 is about 654.8945291784.

The spelling of 280875648 in words is "two hundred eighty million, eight hundred seventy-five thousand, six hundred forty-eight".