3994020 has 36 divisors (see below), whose sum is σ = 12115740. Its totient is φ = 1065024.

The previous prime is 3994007. The next prime is 3994021. The reversal of 3994020 is 204993.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 1937664 = 1434^2 + 1392^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (3994021) 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, 10915 + ... + 11274.

Almost surely, 2^3994020 is an apocalyptic number.

3994020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3994020 is an abundant number, since it is smaller than the sum of its proper divisors (8121720).

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

3994020 is a wasteful number, since it uses less digits than its factorization.

3994020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22204 (or 22199 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3994020 is about 1998.5044408257. The cubic root of 3994020 is about 158.6609602574.

Subtracting from 3994020 its sum of digits (27), we obtain a palindrome (3993993).

The spelling of 3994020 in words is "three million, nine hundred ninety-four thousand, twenty".