279998424 has 128 divisors (see below), whose sum is σ = 801792000. Its totient is φ = 90502272.

The previous prime is 279998401. The next prime is 279998431. The reversal of 279998424 is 424899972.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1618402 + ... + 1618574.

It is an arithmetic number, because the mean of its divisors is an integer number (6264000).

Almost surely, 2^279998424 is an apocalyptic number.

279998424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 279998424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400896000).

279998424 is an abundant number, since it is smaller than the sum of its proper divisors (521793576).

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

279998424 is a wasteful number, since it uses less digits than its factorization.

279998424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 364 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 279998424 is about 16733.1534386080. The cubic root of 279998424 is about 654.2120346067.

The spelling of 279998424 in words is "two hundred seventy-nine million, nine hundred ninety-eight thousand, four hundred twenty-four".