18072879 has 8 divisors (see below), whose sum is σ = 26287872. Its totient is φ = 10953240.

The previous prime is 18072877. The next prime is 18072883. The reversal of 18072879 is 97827081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18072879 - 2¹ = 18072877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18072879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273799 + ... + 273864.

It is an arithmetic number, because the mean of its divisors is an integer number (3285984).

Almost surely, 2^18072879 is an apocalyptic number.

18072879 is a deficient number, since it is larger than the sum of its proper divisors (8214993).

18072879 is a wasteful number, since it uses less digits than its factorization.

18072879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547677.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 18072879 is about 4251.2208834639. The cubic root of 18072879 is about 262.4273613073.

The spelling of 18072879 in words is "eighteen million, seventy-two thousand, eight hundred seventy-nine".