4500090 has 64 divisors (see below), whose sum is σ = 13720320. Its totient is φ = 1028160.

The previous prime is 4500061. The next prime is 4500103. The reversal of 4500090 is 900054.

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

It is an Ulam number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 700 + ... + 3080.

It is an arithmetic number, because the mean of its divisors is an integer number (214380).

Almost surely, 2^4500090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4500090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6860160).

4500090 is an abundant number, since it is smaller than the sum of its proper divisors (9220230).

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

4500090 is a wasteful number, since it uses less digits than its factorization.

4500090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 4500090 is about 2121.3415566570. The cubic root of 4500090 is about 165.0974630798.

The spelling of 4500090 in words is "four million, five hundred thousand, ninety".