18878079 has 8 divisors (see below), whose sum is σ = 27459072. Its totient is φ = 11441240.

The previous prime is 18878071. The next prime is 18878089. The reversal of 18878079 is 97087881.

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

It is a cyclic number.

It is not a de Polignac number, because 18878079 - 2³ = 18878071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18878071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285999 + ... + 286064.

It is an arithmetic number, because the mean of its divisors is an integer number (3432384).

Almost surely, 2^18878079 is an apocalyptic number.

18878079 is a deficient number, since it is larger than the sum of its proper divisors (8580993).

18878079 is a wasteful number, since it uses less digits than its factorization.

18878079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572077.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 18878079 is about 4344.8911378768. The cubic root of 18878079 is about 266.2681779121.

The spelling of 18878079 in words is "eighteen million, eight hundred seventy-eight thousand, seventy-nine".