3891266 has 16 divisors (see below), whose sum is σ = 6222744. Its totient is φ = 1818624.

The previous prime is 3891263. The next prime is 3891287. The reversal of 3891266 is 6621983.

It can be written as a sum of positive squares in 4 ways, for example, as 3500641 + 390625 = 1871^2 + 625^2 .

It is not an unprimeable number, because it can be changed into a prime (3891263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6266 + ... + 6858.

Almost surely, 2^3891266 is an apocalyptic number.

3891266 is a deficient number, since it is larger than the sum of its proper divisors (2331478).

3891266 is a wasteful number, since it uses less digits than its factorization.

3891266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its digits is 15552, while the sum is 35.

The square root of 3891266 is about 1972.6292099632. The cubic root of 3891266 is about 157.2885008636.

The spelling of 3891266 in words is "three million, eight hundred ninety-one thousand, two hundred sixty-six".