280463872 has 80 divisors (see below), whose sum is σ = 624725640. Its totient is φ = 124895232.

The previous prime is 280463861. The next prime is 280463873. The reversal of 280463872 is 278364082.

280463872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 261662976 + 18800896 = 16176^2 + 4336^2 .

It is not an unprimeable number, because it can be changed into a prime (280463873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192298 + ... + 193750.

Almost surely, 2^280463872 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 280463872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312362820).

280463872 is an abundant number, since it is smaller than the sum of its proper divisors (344261768).

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

280463872 is a wasteful number, since it uses less digits than its factorization.

280463872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 280463872 is about 16747.0556218101. The cubic root of 280463872 is about 654.5743379697.

The spelling of 280463872 in words is "two hundred eighty million, four hundred sixty-three thousand, eight hundred seventy-two".