45188190 has 48 divisors (see below), whose sum is σ = 119429856. Its totient is φ = 11851200.

The previous prime is 45188189. The next prime is 45188201. The reversal of 45188190 is 9188154.

It is a super-2 number, since 2×45188190² = 4083945030952200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1375 + ... + 9605.

It is an arithmetic number, because the mean of its divisors is an integer number (2488122).

Almost surely, 2^45188190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45188190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59714928).

45188190 is an abundant number, since it is smaller than the sum of its proper divisors (74241666).

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

45188190 is a wasteful number, since it uses less digits than its factorization.

45188190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8305 (or 8302 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 45188190 is about 6722.2161524307. The cubic root of 45188190 is about 356.1844717887.

Subtracting from 45188190 its sum of digits (36), we obtain a palindrome (45188154).

The spelling of 45188190 in words is "forty-five million, one hundred eighty-eight thousand, one hundred ninety".