45081620 has 48 divisors (see below), whose sum is σ = 101787840. Its totient is φ = 16710144.

The previous prime is 45081613. The next prime is 45081629. The reversal of 45081620 is 2618054.

45081620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 45081620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45081629) 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 15 ways as a sum of consecutive naturals, for example, 21791 + ... + 23769.

It is an arithmetic number, because the mean of its divisors is an integer number (2120580).

Almost surely, 2^45081620 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 45081620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50893920).

45081620 is an abundant number, since it is smaller than the sum of its proper divisors (56706220).

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

45081620 is a wasteful number, since it uses less digits than its factorization.

45081620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 45081620 is about 6714.2847720364. The cubic root of 45081620 is about 355.9042476984.

Adding to 45081620 its reverse (2618054), we get a palindrome (47699674).

The spelling of 45081620 in words is "forty-five million, eighty-one thousand, six hundred twenty".