18249238 has 8 divisors (see below), whose sum is σ = 31284432. Its totient is φ = 7821096.

The previous prime is 18249221. The next prime is 18249241. The reversal of 18249238 is 83294281.

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

It is a junction number, because it is equal to n+sod(n) for n = 18249197 and 18249206.

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, 651745 + ... + 651772.

It is an arithmetic number, because the mean of its divisors is an integer number (3910554).

Almost surely, 2^18249238 is an apocalyptic number.

18249238 is a deficient number, since it is larger than the sum of its proper divisors (13035194).

18249238 is a wasteful number, since it uses less digits than its factorization.

18249238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303526.

The product of its digits is 27648, while the sum is 37.

The square root of 18249238 is about 4271.9126863736. The cubic root of 18249238 is about 263.2782070510.

The spelling of 18249238 in words is "eighteen million, two hundred forty-nine thousand, two hundred thirty-eight".