3998826 has 48 divisors (see below), whose sum is σ = 9749376. Its totient is φ = 1175328.

The previous prime is 3998821. The next prime is 3998831. The reversal of 3998826 is 6288993.

It is an interprime number because it is at equal distance from previous prime (3998821) and next prime (3998831).

It is not an unprimeable number, because it can be changed into a prime (3998821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5011 + ... + 5753.

It is an arithmetic number, because the mean of its divisors is an integer number (203112).

Almost surely, 2^3998826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3998826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4874688).

3998826 is an abundant number, since it is smaller than the sum of its proper divisors (5750550).

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

3998826 is a wasteful number, since it uses less digits than its factorization.

3998826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 784 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 3998826 is about 1999.7064784613. The cubic root of 3998826 is about 158.7245736036.

The spelling of 3998826 in words is "three million, nine hundred ninety-eight thousand, eight hundred twenty-six".