45312140 has 24 divisors (see below), whose sum is σ = 100753632. Its totient is φ = 17058560.

The previous prime is 45312133. The next prime is 45312143. The reversal of 45312140 is 4121354.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (45312143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66296 + ... + 66975.

It is an arithmetic number, because the mean of its divisors is an integer number (4198068).

Almost surely, 2^45312140 is an apocalyptic number.

It is an amenable number.

45312140 is an abundant number, since it is smaller than the sum of its proper divisors (55441492).

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

45312140 is a wasteful number, since it uses less digits than its factorization.

45312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133297 (or 133295 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 45312140 is about 6731.4292687363. The cubic root of 45312140 is about 356.5098426442.

Adding to 45312140 its reverse (4121354), we get a palindrome (49433494).

The spelling of 45312140 in words is "forty-five million, three hundred twelve thousand, one hundred forty".