280994448 has 80 divisors (see below), whose sum is σ = 831482496. Its totient is φ = 80102400.

The previous prime is 280994437. The next prime is 280994453. The reversal of 280994448 is 844499082.

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 = 280994397 and 280994406.

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 15 ways as a sum of consecutive naturals, for example, 234940 + ... + 236132.

Almost surely, 2^280994448 is an apocalyptic number.

280994448 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 280994448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415741248).

280994448 is an abundant number, since it is smaller than the sum of its proper divisors (550488048).

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

280994448 is a wasteful number, since it uses less digits than its factorization.

280994448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 280994448 is about 16762.8890111460. The cubic root of 280994448 is about 654.9868482102.

The spelling of 280994448 in words is "two hundred eighty million, nine hundred ninety-four thousand, four hundred forty-eight".