45990128 has 20 divisors (see below), whose sum is σ = 89259168. Its totient is φ = 22955520.

The previous prime is 45990121. The next prime is 45990169. The reversal of 45990128 is 82109954.

45990128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 45990091 and 45990100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45990121) 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 3 ways as a sum of consecutive naturals, for example, 8633 + ... + 12903.

Almost surely, 2^45990128 is an apocalyptic number.

It is an amenable number.

45990128 is a deficient number, since it is larger than the sum of its proper divisors (43269040).

45990128 is a wasteful number, since it uses less digits than its factorization.

45990128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952 (or 4946 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 45990128 is about 6781.6021705789. The cubic root of 45990128 is about 358.2791534934.

The spelling of 45990128 in words is "forty-five million, nine hundred ninety thousand, one hundred twenty-eight".