280283968 has 14 divisors (see below), whose sum is σ = 556188626. Its totient is φ = 140141952.

The previous prime is 280283963. The next prime is 280283977. The reversal of 280283968 is 869382082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 167754304 + 112529664 = 12952^2 + 10608^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280283963) by changing a digit.

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 as a sum of consecutive naturals, namely, 2189655 + ... + 2189782.

It is an arithmetic number, because the mean of its divisors is an integer number (39727759).

Almost surely, 2^280283968 is an apocalyptic number.

It is an amenable number.

280283968 is a deficient number, since it is larger than the sum of its proper divisors (275904658).

280283968 is an equidigital number, since it uses as much as digits as its factorization.

280283968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379449 (or 4379439 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 280283968 is about 16741.6835473617. The cubic root of 280283968 is about 654.4343487808.

The spelling of 280283968 in words is "two hundred eighty million, two hundred eighty-three thousand, nine hundred sixty-eight".