45309420 has 216 divisors, whose sum is σ = 159576144. Its totient is φ = 10340352.

The previous prime is 45309389. The next prime is 45309443. The reversal of 45309420 is 2490354.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 676227 + ... + 676293.

Almost surely, 2^45309420 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 45309420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79788072).

45309420 is an abundant number, since it is smaller than the sum of its proper divisors (114266724).

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

45309420 is a wasteful number, since it uses less digits than its factorization.

45309420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 45309420 is about 6731.2272283737. The cubic root of 45309420 is about 356.5027089697.

Adding to 45309420 its reverse (2490354), we get a palindrome (47799774).

The spelling of 45309420 in words is "forty-five million, three hundred nine thousand, four hundred twenty".