4509990 has 24 divisors (see below), whose sum is σ = 11726208. Its totient is φ = 1202640.

The previous prime is 4509983. The next prime is 4509997. The reversal of 4509990 is 999054.

It is an interprime number because it is at equal distance from previous prime (4509983) and next prime (4509997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4509997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24966 + ... + 25145.

It is an arithmetic number, because the mean of its divisors is an integer number (488592).

Almost surely, 2^4509990 is an apocalyptic number.

4509990 is an abundant number, since it is smaller than the sum of its proper divisors (7216218).

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

4509990 is a wasteful number, since it uses less digits than its factorization.

4509990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50124 (or 50121 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 4509990 is about 2123.6737037502. The cubic root of 4509990 is about 165.2184434575.

It can be divided in two parts, 450 and 9990, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 4509990 in words is "four million, five hundred nine thousand, nine hundred ninety".