280513116 has 36 divisors (see below), whose sum is σ = 763620312. Its totient is φ = 86311584.

The previous prime is 280513111. The next prime is 280513157. The reversal of 280513116 is 611315082.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 280513116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280513111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299226 + ... + 300161.

Almost surely, 2^280513116 is an apocalyptic number.

280513116 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

280513116 is an abundant number, since it is smaller than the sum of its proper divisors (483107196).

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

280513116 is a wasteful number, since it uses less digits than its factorization.

280513116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599410 (or 599405 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 280513116 is about 16748.5257858714. The cubic root of 280513116 is about 654.6126459012.

Adding to 280513116 its reverse (611315082), we get a palindrome (891828198).

The spelling of 280513116 in words is "two hundred eighty million, five hundred thirteen thousand, one hundred sixteen".