45423144 has 72 divisors (see below), whose sum is σ = 133247790. Its totient is φ = 13972608.

The previous prime is 45423139. The next prime is 45423149. The reversal of 45423144 is 44132454.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (45423139) and next prime (45423149).

It can be written as a sum of positive squares in 3 ways, for example, as 23912100 + 21511044 = 4890^2 + 4638^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (45423149) 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 17 ways as a sum of consecutive naturals, for example, 10302 + ... + 14034.

Almost surely, 2^45423144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45423144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66623895).

45423144 is an abundant number, since it is smaller than the sum of its proper divisors (87824646).

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

45423144 is a wasteful number, since it uses less digits than its factorization.

45423144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771 (or 3751 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 45423144 is about 6739.6694280951. The cubic root of 45423144 is about 356.8007267710.

Adding to 45423144 its reverse (44132454), we get a palindrome (89555598).

The spelling of 45423144 in words is "forty-five million, four hundred twenty-three thousand, one hundred forty-four".