279994864 has 20 divisors (see below), whose sum is σ = 542911680. Its totient is φ = 139888640.

The previous prime is 279994861. The next prime is 279994901. The reversal of 279994864 is 468499972.

Its product of digits (7838208) is a multiple of the sum of its prime factors (13608).

It is a junction number, because it is equal to n+sod(n) for n = 279994799 and 279994808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279994861) 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 in 3 ways as a sum of consecutive naturals, for example, 16944 + ... + 29104.

It is an arithmetic number, because the mean of its divisors is an integer number (27145584).

Almost surely, 2^279994864 is an apocalyptic number.

It is an amenable number.

279994864 is a deficient number, since it is larger than the sum of its proper divisors (262916816).

279994864 is a wasteful number, since it uses less digits than its factorization.

279994864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608 (or 13602 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The square root of 279994864 is about 16733.0470626243. The cubic root of 279994864 is about 654.2092619665.

The spelling of 279994864 in words is "two hundred seventy-nine million, nine hundred ninety-four thousand, eight hundred sixty-four".