45188290 has 24 divisors (see below), whose sum is σ = 94619772. Its totient is φ = 15492960.

The previous prime is 45188287. The next prime is 45188317. The reversal of 45188290 is 9288154.

It can be written as a sum of positive squares in 2 ways, for example, as 44129449 + 1058841 = 6643^2 + 1029^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 45621 + ... + 46600.

Almost surely, 2^45188290 is an apocalyptic number.

45188290 is an abundant number, since it is smaller than the sum of its proper divisors (49431482).

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

45188290 is a wasteful number, since it uses less digits than its factorization.

45188290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92242 (or 92235 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 45188290 is about 6722.2235904498. The cubic root of 45188290 is about 356.1847345301.

The spelling of 45188290 in words is "forty-five million, one hundred eighty-eight thousand, two hundred ninety".