3899995 has 16 divisors (see below), whose sum is σ = 5329152. Its totient is φ = 2712160.

The previous prime is 3899989. The next prime is 3900067. The reversal of 3899995 is 5999983.

It is not a de Polignac number, because 3899995 - 2⁵ = 3899963 is a prime.

It is a super-2 number, since 2×3899995² = 30419922000050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (333072).

Almost surely, 2^3899995 is an apocalyptic number.

3899995 is a deficient number, since it is larger than the sum of its proper divisors (1429157).

3899995 is a wasteful number, since it uses less digits than its factorization.

3899995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122.

The product of its digits is 787320, while the sum is 52.

The square root of 3899995 is about 1974.8404998885. The cubic root of 3899995 is about 157.4060243956.

It can be divided in two parts, 3899 and 995, that multiplied together give a triangular number (3879505 = T₂₇₈₅).

The spelling of 3899995 in words is "three million, eight hundred ninety-nine thousand, nine hundred ninety-five".