3921144 has 32 divisors (see below), whose sum is σ = 10320000. Its totient is φ = 1238112.

The previous prime is 3921143. The next prime is 3921161. The reversal of 3921144 is 4411293.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921143) 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, 3844 + ... + 4755.

It is an arithmetic number, because the mean of its divisors is an integer number (322500).

Almost surely, 2^3921144 is an apocalyptic number.

It is an amenable number.

3921144 is an abundant number, since it is smaller than the sum of its proper divisors (6398856).

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

3921144 is a wasteful number, since it uses less digits than its factorization.

3921144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8627 (or 8623 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 3921144 is about 1980.1878698750. The cubic root of 3921144 is about 157.6900401938.

The spelling of 3921144 in words is "three million, nine hundred twenty-one thousand, one hundred forty-four".