280422016 has 32 divisors (see below), whose sum is σ = 638462880. Its totient is φ = 120180480.

The previous prime is 280421971. The next prime is 280422017. The reversal of 280422016 is 610224082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (280422017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155590 + ... + 157381.

It is an arithmetic number, because the mean of its divisors is an integer number (19951965).

Almost surely, 2^280422016 is an apocalyptic number.

It is an amenable number.

280422016 is an abundant number, since it is smaller than the sum of its proper divisors (358040864).

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

280422016 is an equidigital number, since it uses as much as digits as its factorization.

280422016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312992 (or 312980 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 280422016 is about 16745.8059226781. The cubic root of 280422016 is about 654.5417737915.

Adding to 280422016 its reverse (610224082), we get a palindrome (890646098).

The spelling of 280422016 in words is "two hundred eighty million, four hundred twenty-two thousand, sixteen".