18280079 has 8 divisors (see below), whose sum is σ = 18643968. Its totient is φ = 17919000.

The previous prime is 18280069. The next prime is 18280099. The reversal of 18280079 is 97008281.

It is a happy number.

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 18280079 - 2²⁴ = 1502863 is a prime.

It is a super-2 number, since 2×18280079² = 668322576492482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280069) 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, 16274 + ... + 17360.

It is an arithmetic number, because the mean of its divisors is an integer number (2330496).

Almost surely, 2^18280079 is an apocalyptic number.

18280079 is a deficient number, since it is larger than the sum of its proper divisors (363889).

18280079 is a wasteful number, since it uses less digits than its factorization.

18280079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 18280079 is about 4275.5209039367. The cubic root of 18280079 is about 263.4264359500.

The spelling of 18280079 in words is "eighteen million, two hundred eighty thousand, seventy-nine".