280471248 has 100 divisors (see below), whose sum is σ = 833847300. Its totient is φ = 90948096.

The previous prime is 280471199. The next prime is 280471271. The reversal of 280471248 is 842174082.

It can be written as a sum of positive squares in 2 ways, for example, as 180311184 + 100160064 = 13428^2 + 10008^2 .

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

It is a congruent number.

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, 45028 + ... + 50876.

It is an arithmetic number, because the mean of its divisors is an integer number (8338473).

Almost surely, 2^280471248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280471248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416923650).

280471248 is an abundant number, since it is smaller than the sum of its proper divisors (553376052).

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

280471248 is a wasteful number, since it uses less digits than its factorization.

280471248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5906 (or 5891 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 280471248 is about 16747.2758381774. The cubic root of 280471248 is about 654.5800761990.

The spelling of 280471248 in words is "two hundred eighty million, four hundred seventy-one thousand, two hundred forty-eight".