279740085 has 16 divisors (see below), whose sum is σ = 447793920. Its totient is φ = 149124800.

The previous prime is 279740081. The next prime is 279740093. The reversal of 279740085 is 580047972.

It is not a de Polignac number, because 279740085 - 2² = 279740081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279740081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52996 + ... + 58034.

It is an arithmetic number, because the mean of its divisors is an integer number (27987120).

Almost surely, 2^279740085 is an apocalyptic number.

It is an amenable number.

279740085 is a deficient number, since it is larger than the sum of its proper divisors (168053835).

279740085 is a wasteful number, since it uses less digits than its factorization.

279740085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 279740085 is about 16725.4322814091. The cubic root of 279740085 is about 654.0107709885.

The spelling of 279740085 in words is "two hundred seventy-nine million, seven hundred forty thousand, eighty-five".