45809728 has 14 divisors (see below), whose sum is σ = 90903806. Its totient is φ = 22904832.

The previous prime is 45809717. The next prime is 45809773. The reversal of 45809728 is 82790854.

It can be written as a sum of positive squares in only one way, i.e., 31002624 + 14807104 = 5568^2 + 3848^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357825 + ... + 357952.

It is an arithmetic number, because the mean of its divisors is an integer number (6493129).

Almost surely, 2^45809728 is an apocalyptic number.

It is an amenable number.

45809728 is a deficient number, since it is larger than the sum of its proper divisors (45094078).

45809728 is an equidigital number, since it uses as much as digits as its factorization.

45809728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715789 (or 715779 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 45809728 is about 6768.2884099305. The cubic root of 45809728 is about 357.8100799707.

The spelling of 45809728 in words is "forty-five million, eight hundred nine thousand, seven hundred twenty-eight".