18438982 has 8 divisors (see below), whose sum is σ = 29285496. Its totient is φ = 8677152.

The previous prime is 18438977. The next prime is 18439007. The reversal of 18438982 is 28983481.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271128 + ... + 271195.

It is an arithmetic number, because the mean of its divisors is an integer number (3660687).

Almost surely, 2^18438982 is an apocalyptic number.

18438982 is a deficient number, since it is larger than the sum of its proper divisors (10846514).

18438982 is a wasteful number, since it uses less digits than its factorization.

18438982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542342.

The product of its digits is 110592, while the sum is 43.

The square root of 18438982 is about 4294.0635766136. The cubic root of 18438982 is about 264.1875293701.

The spelling of 18438982 in words is "eighteen million, four hundred thirty-eight thousand, nine hundred eighty-two".