3961836 has 18 divisors (see below), whose sum is σ = 10014732. Its totient is φ = 1320600.

The previous prime is 3961817. The next prime is 3961847. The reversal of 3961836 is 6381693.

It is a happy number.

3961836 is a `hidden beast` number, since 3 + 9 + 618 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×3961836² = 31392288981792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 110051 = 3961836 / (3 + 9 + 6 + 1 + 8 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 3961836.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54990 + ... + 55061.

It is an arithmetic number, because the mean of its divisors is an integer number (556374).

Almost surely, 2^3961836 is an apocalyptic number.

3961836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3961836 is an abundant number, since it is smaller than the sum of its proper divisors (6052896).

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

3961836 is a wasteful number, since it uses less digits than its factorization.

3961836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110061 (or 110056 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3961836 is about 1990.4361331125. The cubic root of 3961836 is about 158.2336446040.

The spelling of 3961836 in words is "three million, nine hundred sixty-one thousand, eight hundred thirty-six".