3921544 has 16 divisors (see below), whose sum is σ = 8021520. Its totient is φ = 1782480.

The previous prime is 3921529. The next prime is 3921551. The reversal of 3921544 is 4451293.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22194 + ... + 22369.

It is an arithmetic number, because the mean of its divisors is an integer number (501345).

Almost surely, 2^3921544 is an apocalyptic number.

It is an amenable number.

3921544 is an abundant number, since it is smaller than the sum of its proper divisors (4099976).

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

3921544 is a wasteful number, since it uses less digits than its factorization.

3921544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44580 (or 44576 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 3921544 is about 1980.2888678170. The cubic root of 3921544 is about 157.6954020534.

It can be divided in two parts, 3921 and 544, that added together give a triangular number (4465 = T₉₄).

The spelling of 3921544 in words is "three million, nine hundred twenty-one thousand, five hundred forty-four".