45128140 has 24 divisors (see below), whose sum is σ = 94962672. Its totient is φ = 18014400.

The previous prime is 45128129. The next prime is 45128189. The reversal of 45128140 is 4182154.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9115 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (3956778).

Almost surely, 2^45128140 is an apocalyptic number.

It is an amenable number.

45128140 is an abundant number, since it is smaller than the sum of its proper divisors (49834532).

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

45128140 is a wasteful number, since it uses less digits than its factorization.

45128140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617 (or 4615 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 45128140 is about 6717.7481346058. The cubic root of 45128140 is about 356.0266255388.

The spelling of 45128140 in words is "forty-five million, one hundred twenty-eight thousand, one hundred forty".