45772740 has 144 divisors (see below), whose sum is σ = 154592256. Its totient is φ = 10886400.

The previous prime is 45772739. The next prime is 45772747. The reversal of 45772740 is 4727754.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 45772695 and 45772704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45772747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72225 + ... + 72855.

Almost surely, 2^45772740 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 45772740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77296128).

45772740 is an abundant number, since it is smaller than the sum of its proper divisors (108819516).

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

45772740 is a wasteful number, since it uses less digits than its factorization.

45772740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 45772740 is about 6765.5554095728. Note that the first 3 decimals coincide. The cubic root of 45772740 is about 357.7137522296.

The spelling of 45772740 in words is "forty-five million, seven hundred seventy-two thousand, seven hundred forty".