45320220 has 144 divisors (see below), whose sum is σ = 153474048. Its totient is φ = 10730880.

The previous prime is 45320213. The next prime is 45320221. The reversal of 45320220 is 2202354.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 45320193 and 45320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45320221) 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 47 ways as a sum of consecutive naturals, for example, 92817 + ... + 93303.

It is an arithmetic number, because the mean of its divisors is an integer number (1065792).

Almost surely, 2^45320220 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 45320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76737024).

45320220 is an abundant number, since it is smaller than the sum of its proper divisors (108153828).

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

45320220 is a wasteful number, since it uses less digits than its factorization.

45320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 45320220 is about 6732.0294117005. The cubic root of 45320220 is about 356.5310321703.

Adding to 45320220 its reverse (2202354), we get a palindrome (47522574).

The spelling of 45320220 in words is "forty-five million, three hundred twenty thousand, two hundred twenty".