3998085 has 64 divisors (see below), whose sum is σ = 8225280. Its totient is φ = 1612800.

The previous prime is 3998069. The next prime is 3998089. The reversal of 3998085 is 5808993.

It is not a de Polignac number, because 3998085 - 2⁴ = 3998069 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998089) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39535 + ... + 39635.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

Almost surely, 2^3998085 is an apocalyptic number.

3998085 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3998085 is an abundant number, since it is smaller than the sum of its proper divisors (4227195).

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

3998085 is a wasteful number, since it uses less digits than its factorization.

3998085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 3998085 is about 1999.5211926859. The cubic root of 3998085 is about 158.7147688780.

The spelling of 3998085 in words is "three million, nine hundred ninety-eight thousand, eighty-five".