18025290 has 48 divisors (see below), whose sum is σ = 48141288. Its totient is φ = 4675968.

The previous prime is 18025283. The next prime is 18025297. The reversal of 18025290 is 9252081.

It is an interprime number because it is at equal distance from previous prime (18025283) and next prime (18025297).

It can be written as a sum of positive squares in 4 ways, for example, as 15468489 + 2556801 = 3933^2 + 1599^2 .

It is a super-2 number, since 2×18025290² = 649822159168200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18025297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 624 + ... + 6036.

Almost surely, 2^18025290 is an apocalyptic number.

18025290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18025290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24070644).

18025290 is an abundant number, since it is smaller than the sum of its proper divisors (30115998).

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

18025290 is a wasteful number, since it uses less digits than its factorization.

18025290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463 (or 5460 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18025290 is about 4245.6200960519. The cubic root of 18025290 is about 262.1968200387.

The spelling of 18025290 in words is "eighteen million, twenty-five thousand, two hundred ninety".