280023712 has 48 divisors (see below), whose sum is σ = 581116032. Its totient is φ = 132563200.

The previous prime is 280023707. The next prime is 280023743. The reversal of 280023712 is 217320082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72453 + ... + 76219.

It is an arithmetic number, because the mean of its divisors is an integer number (12106584).

Almost surely, 2^280023712 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 280023712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290558016).

280023712 is an abundant number, since it is smaller than the sum of its proper divisors (301092320).

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

280023712 is a wasteful number, since it uses less digits than its factorization.

280023712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901 (or 3893 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 280023712 is about 16733.9090472011. The cubic root of 280023712 is about 654.2317290222.

Adding to 280023712 its reverse (217320082), we get a palindrome (497343794).

The spelling of 280023712 in words is "two hundred eighty million, twenty-three thousand, seven hundred twelve".