18249156 has 36 divisors (see below), whose sum is σ = 46273500. Its totient is φ = 6064128.

The previous prime is 18249137. The next prime is 18249167. The reversal of 18249156 is 65194281.

It can be written as a sum of positive squares in 2 ways, for example, as 5760000 + 12489156 = 2400^2 + 3534^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18249156.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15600 + ... + 16728.

It is an arithmetic number, because the mean of its divisors is an integer number (1285375).

Almost surely, 2^18249156 is an apocalyptic number.

It is an amenable number.

18249156 is an abundant number, since it is smaller than the sum of its proper divisors (28024344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18249156 is a wasteful number, since it uses less digits than its factorization.

18249156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1583 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 18249156 is about 4271.9030887884. The cubic root of 18249156 is about 263.2778127177.

The spelling of 18249156 in words is "eighteen million, two hundred forty-nine thousand, one hundred fifty-six".