18275438 has 16 divisors (see below), whose sum is σ = 28077840. Its totient is φ = 8918976.

The previous prime is 18275431. The next prime is 18275441. The reversal of 18275438 is 83457281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18275431) 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, 14156 + ... + 15392.

It is an arithmetic number, because the mean of its divisors is an integer number (1754865).

Almost surely, 2^18275438 is an apocalyptic number.

18275438 is a deficient number, since it is larger than the sum of its proper divisors (9802402).

18275438 is a wasteful number, since it uses less digits than its factorization.

18275438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its digits is 53760, while the sum is 38.

The square root of 18275438 is about 4274.9781285990. The cubic root of 18275438 is about 263.4041409048.

The spelling of 18275438 in words is "eighteen million, two hundred seventy-five thousand, four hundred thirty-eight".