3998670 has 32 divisors (see below), whose sum is σ = 10336032. Its totient is φ = 984192.

The previous prime is 3998669. The next prime is 3998671. The reversal of 3998670 is 768993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3998669) and next prime (3998671).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4737 + ... + 5516.

It is an arithmetic number, because the mean of its divisors is an integer number (323001).

Almost surely, 2^3998670 is an apocalyptic number.

3998670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3998670 is an abundant number, since it is smaller than the sum of its proper divisors (6337362).

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

3998670 is a wasteful number, since it uses less digits than its factorization.

3998670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3998670 is about 1999.6674723563. The cubic root of 3998670 is about 158.7225095515.

The spelling of 3998670 in words is "three million, nine hundred ninety-eight thousand, six hundred seventy".