3918861 has 12 divisors (see below), whose sum is σ = 5870592. Its totient is φ = 2612412.

The previous prime is 3918853. The next prime is 3918869. The reversal of 3918861 is 1688193.

It is an interprime number because it is at equal distance from previous prime (3918853) and next prime (3918869).

It is not a de Polignac number, because 3918861 - 2³ = 3918853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918869) 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, 7821 + ... + 8306.

It is an arithmetic number, because the mean of its divisors is an integer number (489216).

Almost surely, 2^3918861 is an apocalyptic number.

It is an amenable number.

3918861 is a deficient number, since it is larger than the sum of its proper divisors (1951731).

3918861 is an equidigital number, since it uses as much as digits as its factorization.

3918861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16142 (or 16130 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 3918861 is about 1979.6113254879. The cubic root of 3918861 is about 157.6594303978.

The spelling of 3918861 in words is "three million, nine hundred eighteen thousand, eight hundred sixty-one".