280000448 has 112 divisors (see below), whose sum is σ = 690945024. Its totient is φ = 109624320.

The previous prime is 280000403. The next prime is 280000451. The reversal of 280000448 is 844000082.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762761 + ... + 763127.

It is an arithmetic number, because the mean of its divisors is an integer number (6169152).

Almost surely, 2^280000448 is an apocalyptic number.

280000448 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 280000448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345472512).

280000448 is an abundant number, since it is smaller than the sum of its proper divisors (410944576).

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

280000448 is a wasteful number, since it uses less digits than its factorization.

280000448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 280000448 is about 16733.2139172366. The cubic root of 280000448 is about 654.2136109513.

It can be divided in two parts, 280000 and 448, that multiplied together give a square (125440000 = 11200²).

The spelling of 280000448 in words is "two hundred eighty million, four hundred forty-eight", and thus it is an aban number.