45018090 has 96 divisors (see below), whose sum is σ = 127567440. Its totient is φ = 10948608.

The previous prime is 45018089. The next prime is 45018097. The reversal of 45018090 is 9081054.

It can be written as a sum of positive squares in 8 ways, for example, as 13242321 + 31775769 = 3639^2 + 5637^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45018097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127354 + ... + 127706.

Almost surely, 2^45018090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45018090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63783720).

45018090 is an abundant number, since it is smaller than the sum of its proper divisors (82549350).

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

45018090 is a wasteful number, since it uses less digits than its factorization.

45018090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 485 counting only the distinct ones).

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

The square root of 45018090 is about 6709.5521460080. The cubic root of 45018090 is about 355.7369864340.

The spelling of 45018090 in words is "forty-five million, eighteen thousand, ninety".