3812391 has 24 divisors (see below), whose sum is σ = 6084624. Its totient is φ = 2280960.

The previous prime is 3812387. The next prime is 3812399. The reversal of 3812391 is 1932183.

3812391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3812391 - 2² = 3812387 is a prime.

3812391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3812399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9405 + ... + 9801.

It is an arithmetic number, because the mean of its divisors is an integer number (253526).

Almost surely, 2^3812391 is an apocalyptic number.

3812391 is a deficient number, since it is larger than the sum of its proper divisors (2272233).

3812391 is a wasteful number, since it uses less digits than its factorization.

3812391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 508 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 3812391 is about 1952.5345067373. The cubic root of 3812391 is about 156.2185054389.

It can be divided in two parts, 381 and 2391, that added together give a palindrome (2772).

The spelling of 3812391 in words is "three million, eight hundred twelve thousand, three hundred ninety-one".