3998817 has 12 divisors (see below), whose sum is σ = 5793424. Its totient is φ = 2657880.

The previous prime is 3998809. The next prime is 3998821. The reversal of 3998817 is 7188993.

It is not a de Polignac number, because 3998817 - 2³ = 3998809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998837) 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, 5442 + ... + 6132.

Almost surely, 2^3998817 is an apocalyptic number.

It is an amenable number.

3998817 is a deficient number, since it is larger than the sum of its proper divisors (1794607).

3998817 is a wasteful number, since it uses less digits than its factorization.

3998817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1337 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3998817 is about 1999.7042281298. The cubic root of 3998817 is about 158.7244545251.

It can be divided in two parts, 399 and 8817, that added together give a square (9216 = 96²).

The spelling of 3998817 in words is "three million, nine hundred ninety-eight thousand, eight hundred seventeen".