3994890 has 64 divisors (see below), whose sum is σ = 10177920. Its totient is φ = 1002240.

The previous prime is 3994849. The next prime is 3994891. The reversal of 3994890 is 984993.

It is a super-2 number, since 2×3994890² = 31918292224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3994891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65460 + ... + 65520.

It is an arithmetic number, because the mean of its divisors is an integer number (159030).

Almost surely, 2^3994890 is an apocalyptic number.

3994890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3994890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5088960).

3994890 is an abundant number, since it is smaller than the sum of its proper divisors (6183030).

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

3994890 is a wasteful number, since it uses less digits than its factorization.

3994890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 3994890 is about 1998.7220917376. The cubic root of 3994890 is about 158.6724795633.

It can be divided in two parts, 3994 and 890, that added together give a palindrome (4884).

The spelling of 3994890 in words is "three million, nine hundred ninety-four thousand, eight hundred ninety".