18224078 has 8 divisors (see below), whose sum is σ = 28774920. Its totient is φ = 8632440.

The previous prime is 18224077. The next prime is 18224081. The reversal of 18224078 is 87042281.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18224071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239753 + ... + 239828.

It is an arithmetic number, because the mean of its divisors is an integer number (3596865).

Almost surely, 2^18224078 is an apocalyptic number.

18224078 is a deficient number, since it is larger than the sum of its proper divisors (10550842).

18224078 is a wasteful number, since it uses less digits than its factorization.

18224078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479602.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18224078 is about 4268.9668539355. The cubic root of 18224078 is about 263.1571585958.

The spelling of 18224078 in words is "eighteen million, two hundred twenty-four thousand, seventy-eight".