45415818 has 48 divisors (see below), whose sum is σ = 114865920. Its totient is φ = 12698208.

The previous prime is 45415813. The next prime is 45415819. The reversal of 45415818 is 81851454.

It is not an unprimeable number, because it can be changed into a prime (45415813) 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, 2088 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (2393040).

Almost surely, 2^45415818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45415818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57432960).

45415818 is an abundant number, since it is smaller than the sum of its proper divisors (69450102).

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

45415818 is a wasteful number, since it uses less digits than its factorization.

45415818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7731 (or 7728 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 45415818 is about 6739.1259077124. The cubic root of 45415818 is about 356.7815437258.

The spelling of 45415818 in words is "forty-five million, four hundred fifteen thousand, eight hundred eighteen".