9045820 has 24 divisors (see below), whose sum is σ = 21710304. Its totient is φ = 3101376.

The previous prime is 9045811. The next prime is 9045823. The reversal of 9045820 is 285409.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9045823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32167 + ... + 32446.

It is an arithmetic number, because the mean of its divisors is an integer number (904596).

Almost surely, 2^9045820 is an apocalyptic number.

It is an amenable number.

9045820 is an abundant number, since it is smaller than the sum of its proper divisors (12664484).

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

9045820 is a wasteful number, since it uses less digits than its factorization.

9045820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64629 (or 64627 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 9045820 is about 3007.6269715508. The cubic root of 9045820 is about 208.3607828720.

It can be divided in two parts, 904 and 5820, that added together give a square (6724 = 82²).

The spelling of 9045820 in words is "nine million, forty-five thousand, eight hundred twenty".