45132440 has 32 divisors (see below), whose sum is σ = 105965280. Its totient is φ = 17267712.

The previous prime is 45132421. The next prime is 45132443. The reversal of 45132440 is 4423154.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45132443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23609 + ... + 25448.

It is an arithmetic number, because the mean of its divisors is an integer number (3311415).

Almost surely, 2^45132440 is an apocalyptic number.

45132440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45132440 is an abundant number, since it is smaller than the sum of its proper divisors (60832840).

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

45132440 is a wasteful number, since it uses less digits than its factorization.

45132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49091 (or 49087 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 45132440 is about 6718.0681747062. The cubic root of 45132440 is about 356.0379330871.

Adding to 45132440 its reverse (4423154), we get a palindrome (49555594).

The spelling of 45132440 in words is "forty-five million, one hundred thirty-two thousand, four hundred forty".