3998266 has 8 divisors (see below), whose sum is σ = 6038100. Its totient is φ = 1985568.

The previous prime is 3998263. The next prime is 3998273. The reversal of 3998266 is 6628993.

It can be written as a sum of positive squares in 2 ways, for example, as 3690241 + 308025 = 1921^2 + 555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3998266² = 31972262013512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3998261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6411 + ... + 7006.

Almost surely, 2^3998266 is an apocalyptic number.

3998266 is a deficient number, since it is larger than the sum of its proper divisors (2039834).

3998266 is a wasteful number, since it uses less digits than its factorization.

3998266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13568.

The product of its digits is 139968, while the sum is 43.

The square root of 3998266 is about 1999.5664530093. The cubic root of 3998266 is about 158.7171639363.

The spelling of 3998266 in words is "three million, nine hundred ninety-eight thousand, two hundred sixty-six".