3990105 has 48 divisors (see below), whose sum is σ = 8087040. Its totient is φ = 1782144.

The previous prime is 3990097. The next prime is 3990113. The reversal of 3990105 is 5010993.

It is an interprime number because it is at equal distance from previous prime (3990097) and next prime (3990113).

It is not a de Polignac number, because 3990105 - 2³ = 3990097 is a prime.

It is a super-2 number, since 2×3990105² = 31841875822050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16576 + ... + 16814.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

Almost surely, 2^3990105 is an apocalyptic number.

3990105 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3990105 is an abundant number, since it is smaller than the sum of its proper divisors (4096935).

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

3990105 is a wasteful number, since it uses less digits than its factorization.

3990105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 3990105 is about 1997.5247182451. The cubic root of 3990105 is about 158.6091026698.

It can be divided in two parts, 3990 and 105, that added together give a triangular number (4095 = T₉₀).

The spelling of 3990105 in words is "three million, nine hundred ninety thousand, one hundred five".