4189990 has 48 divisors (see below), whose sum is σ = 9307872. Its totient is φ = 1349376.

The previous prime is 4189987. The next prime is 4190009. The reversal of 4189990 is 999814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8079 + ... + 8581.

It is an arithmetic number, because the mean of its divisors is an integer number (193914).

Almost surely, 2^4189990 is an apocalyptic number.

4189990 is an abundant number, since it is smaller than the sum of its proper divisors (5117882).

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

4189990 is a wasteful number, since it uses less digits than its factorization.

4189990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 4189990 is about 2046.9465063846. The cubic root of 4189990 is about 161.2145846947.

The spelling of 4189990 in words is "four million, one hundred eighty-nine thousand, nine hundred ninety".