18439498 has 16 divisors (see below), whose sum is σ = 34484544. Its totient is φ = 7184160.

The previous prime is 18439483. The next prime is 18439517. The reversal of 18439498 is 89493481.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59715 + ... + 60022.

It is an arithmetic number, because the mean of its divisors is an integer number (2155284).

Almost surely, 2^18439498 is an apocalyptic number.

18439498 is a deficient number, since it is larger than the sum of its proper divisors (16045046).

18439498 is a wasteful number, since it uses less digits than its factorization.

18439498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119757.

The product of its digits is 248832, while the sum is 46.

The square root of 18439498 is about 4294.1236591416. The cubic root of 18439498 is about 264.1899937052.

The spelling of 18439498 in words is "eighteen million, four hundred thirty-nine thousand, four hundred ninety-eight".