3998015 has 8 divisors (see below), whose sum is σ = 5483040. Its totient is φ = 2741472.

The previous prime is 3998003. The next prime is 3998041. The reversal of 3998015 is 5108993.

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

It is a cyclic number.

It is not a de Polignac number, because 3998015 - 2⁸ = 3997759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 114229 = 3998015 / (3 + 9 + 9 + 8 + 0 + 1 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57080 + ... + 57149.

It is an arithmetic number, because the mean of its divisors is an integer number (685380).

Almost surely, 2^3998015 is an apocalyptic number.

3998015 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3998015 is a deficient number, since it is larger than the sum of its proper divisors (1485025).

3998015 is a wasteful number, since it uses less digits than its factorization.

3998015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114241.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 3998015 is about 1999.5036884187. The cubic root of 3998015 is about 158.7138425930.

The spelling of 3998015 in words is "three million, nine hundred ninety-eight thousand, fifteen".