3944815 has 16 divisors (see below), whose sum is σ = 5544000. Its totient is φ = 2638080.

The previous prime is 3944813. The next prime is 3944821. The reversal of 3944815 is 5184493.

It is not a de Polignac number, because 3944815 - 2¹ = 3944813 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61 + ... + 2809.

It is an arithmetic number, because the mean of its divisors is an integer number (346500).

Almost surely, 2^3944815 is an apocalyptic number.

3944815 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3944815 is a deficient number, since it is larger than the sum of its proper divisors (1599185).

3944815 is a wasteful number, since it uses less digits than its factorization.

3944815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

The product of its digits is 17280, while the sum is 34.

The square root of 3944815 is about 1986.1558347723. The cubic root of 3944815 is about 158.0067160527.

The spelling of 3944815 in words is "three million, nine hundred forty-four thousand, eight hundred fifteen".