45665388 has 72 divisors (see below), whose sum is σ = 119351232. Its totient is φ = 14714112.

The previous prime is 45665381. The next prime is 45665407. The reversal of 45665388 is 88356654.

45665388 is a `hidden beast` number, since 4 + 566 + 5 + 3 + 88 = 666.

45665388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×45665388² = 4170655322381088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45665381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231706 + ... + 231902.

It is an arithmetic number, because the mean of its divisors is an integer number (1657656).

Almost surely, 2^45665388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45665388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59675616).

45665388 is an abundant number, since it is smaller than the sum of its proper divisors (73685844).

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

45665388 is a wasteful number, since it uses less digits than its factorization.

45665388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 386 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 45665388 is about 6757.6170356125. The cubic root of 45665388 is about 357.4338815243.

The spelling of 45665388 in words is "forty-five million, six hundred sixty-five thousand, three hundred eighty-eight".