3998746 has 8 divisors (see below), whose sum is σ = 6024564. Its totient is φ = 1990560.

The previous prime is 3998741. The next prime is 3998749. The reversal of 3998746 is 6478993.

It can be written as a sum of positive squares in 2 ways, for example, as 2927521 + 1071225 = 1711^2 + 1035^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 3998696 and 3998705.

It is not an unprimeable number, because it can be changed into a prime (3998741) 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, 3825 + ... + 4756.

Almost surely, 2^3998746 is an apocalyptic number.

3998746 is a deficient number, since it is larger than the sum of its proper divisors (2025818).

3998746 is a wasteful number, since it uses less digits than its factorization.

3998746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8816.

The product of its digits is 326592, while the sum is 46.

The square root of 3998746 is about 1999.6864754256. The cubic root of 3998746 is about 158.7235151220.

The spelling of 3998746 in words is "three million, nine hundred ninety-eight thousand, seven hundred forty-six".