45128538 has 48 divisors (see below), whose sum is σ = 120347136. Its totient is φ = 11901600.

The previous prime is 45128521. The next prime is 45128539. The reversal of 45128538 is 83582154.

It is a happy number.

45128538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (45128539) 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, 12138 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (2507232).

Almost surely, 2^45128538 is an apocalyptic number.

45128538 is an abundant number, since it is smaller than the sum of its proper divisors (75218598).

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

45128538 is a wasteful number, since it uses less digits than its factorization.

45128538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27579 (or 27576 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 45128538 is about 6717.7777575624. Note that the first 4 decimals coincide. The cubic root of 45128538 is about 356.0276721746.

The spelling of 45128538 in words is "forty-five million, one hundred twenty-eight thousand, five hundred thirty-eight".