279979940 has 48 divisors (see below), whose sum is σ = 604800000. Its totient is φ = 108819072.

The previous prime is 279979933. The next prime is 279979951. The reversal of 279979940 is 49979972.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 139061 + ... + 141059.

It is an arithmetic number, because the mean of its divisors is an integer number (12600000).

Almost surely, 2^279979940 is an apocalyptic number.

279979940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

279979940 is an abundant number, since it is smaller than the sum of its proper divisors (324820060).

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

279979940 is a wasteful number, since it uses less digits than its factorization.

279979940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2202 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 56.

The square root of 279979940 is about 16732.6011127977. The cubic root of 279979940 is about 654.1976384288.

The spelling of 279979940 in words is "two hundred seventy-nine million, nine hundred seventy-nine thousand, nine hundred forty".