279842820 has 48 divisors (see below), whose sum is σ = 784472640. Its totient is φ = 74537856.

The previous prime is 279842819. The next prime is 279842867. The reversal of 279842820 is 28248972.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61959 + ... + 66321.

It is an arithmetic number, because the mean of its divisors is an integer number (16343180).

Almost surely, 2^279842820 is an apocalyptic number.

279842820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

279842820 is an abundant number, since it is smaller than the sum of its proper divisors (504629820).

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

279842820 is a wasteful number, since it uses less digits than its factorization.

279842820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444 (or 5442 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 279842820 is about 16728.5032205514. The cubic root of 279842820 is about 654.0908233617.

The spelling of 279842820 in words is "two hundred seventy-nine million, eight hundred forty-two thousand, eight hundred twenty".