280131712 has 128 divisors (see below), whose sum is σ = 690042240. Its totient is φ = 110542848.

The previous prime is 280131701. The next prime is 280131781. The reversal of 280131712 is 217131082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 807123 + ... + 807469.

It is an arithmetic number, because the mean of its divisors is an integer number (5390955).

Almost surely, 2^280131712 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 280131712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345021120).

280131712 is an abundant number, since it is smaller than the sum of its proper divisors (409910528).

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

280131712 is a wasteful number, since it uses less digits than its factorization.

280131712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 280131712 is about 16737.1357167229. The cubic root of 280131712 is about 654.3158265968.

Adding to 280131712 its reverse (217131082), we get a palindrome (497262794).

The spelling of 280131712 in words is "two hundred eighty million, one hundred thirty-one thousand, seven hundred twelve".