45249720 has 128 divisors (see below), whose sum is σ = 141834240. Its totient is φ = 11540480.

The previous prime is 45249689. The next prime is 45249727. The reversal of 45249720 is 2794254.

45249720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45249727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400384 + ... + 400496.

It is an arithmetic number, because the mean of its divisors is an integer number (1108080).

Almost surely, 2^45249720 is an apocalyptic number.

45249720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45249720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70917120).

45249720 is an abundant number, since it is smaller than the sum of its proper divisors (96584520).

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

45249720 is a wasteful number, since it uses less digits than its factorization.

45249720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 45249720 is about 6726.7912112686. The cubic root of 45249720 is about 356.3460633523.

The spelling of 45249720 in words is "forty-five million, two hundred forty-nine thousand, seven hundred twenty".