45171440 has 20 divisors (see below), whose sum is σ = 105023784. Its totient is φ = 18068544.

The previous prime is 45171437. The next prime is 45171443. The reversal of 45171440 is 4417154.

It is an interprime number because it is at equal distance from previous prime (45171437) and next prime (45171443).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45171443) 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 3 ways as a sum of consecutive naturals, for example, 282242 + ... + 282401.

Almost surely, 2^45171440 is an apocalyptic number.

45171440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45171440 is an abundant number, since it is smaller than the sum of its proper divisors (59852344).

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

45171440 is a wasteful number, since it uses less digits than its factorization.

45171440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564656 (or 564650 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 45171440 is about 6720.9701680635. The cubic root of 45171440 is about 356.1404571379.

Adding to 45171440 its reverse (4417154), we get a palindrome (49588594).

The spelling of 45171440 in words is "forty-five million, one hundred seventy-one thousand, four hundred forty".