45449472 has 144 divisors (see below), whose sum is σ = 131862528. Its totient is φ = 13854720.

The previous prime is 45449399. The next prime is 45449473. The reversal of 45449472 is 27494454.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 45449472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45449473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547543 + ... + 547625.

It is an arithmetic number, because the mean of its divisors is an integer number (915712).

Almost surely, 2^45449472 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 45449472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65931264).

45449472 is an abundant number, since it is smaller than the sum of its proper divisors (86413056).

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

45449472 is a wasteful number, since it uses less digits than its factorization.

45449472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 142 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 45449472 is about 6741.6223566735. The cubic root of 45449472 is about 356.8696493095.

The spelling of 45449472 in words is "forty-five million, four hundred forty-nine thousand, four hundred seventy-two".