4189890 has 16 divisors (see below), whose sum is σ = 10055808. Its totient is φ = 1117296.

The previous prime is 4189883. The next prime is 4189897. The reversal of 4189890 is 989814.

It is an interprime number because it is at equal distance from previous prime (4189883) and next prime (4189897).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4189897) 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, 69802 + ... + 69861.

It is an arithmetic number, because the mean of its divisors is an integer number (628488).

Almost surely, 2^4189890 is an apocalyptic number.

4189890 is an abundant number, since it is smaller than the sum of its proper divisors (5865918).

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

4189890 is a wasteful number, since it uses less digits than its factorization.

4189890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139673.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 4189890 is about 2046.9220796112. The cubic root of 4189890 is about 161.2133021470.

The spelling of 4189890 in words is "four million, one hundred eighty-nine thousand, eight hundred ninety".