280471040 has 80 divisors (see below), whose sum is σ = 680581440. Its totient is φ = 110837760.

The previous prime is 280471033. The next prime is 280471091. The reversal of 280471040 is 40174082.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227225 + ... + 228455.

It is an arithmetic number, because the mean of its divisors is an integer number (8507268).

Almost surely, 2^280471040 is an apocalyptic number.

280471040 is a gapful number since it is divisible by the number (20) 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 280471040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340290720).

280471040 is an abundant number, since it is smaller than the sum of its proper divisors (400110400).

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

280471040 is an equidigital number, since it uses as much as digits as its factorization.

280471040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 280471040 is about 16747.2696282110. The cubic root of 280471040 is about 654.5799143848.

The spelling of 280471040 in words is "two hundred eighty million, four hundred seventy-one thousand, forty".