3921888 has 24 divisors (see below), whose sum is σ = 10295208. Its totient is φ = 1307264.

The previous prime is 3921881. The next prime is 3921893. The reversal of 3921888 is 8881293.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20331 + ... + 20522.

It is an arithmetic number, because the mean of its divisors is an integer number (428967).

Almost surely, 2^3921888 is an apocalyptic number.

It is an amenable number.

3921888 is an abundant number, since it is smaller than the sum of its proper divisors (6373320).

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

3921888 is a wasteful number, since it uses less digits than its factorization.

3921888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40866 (or 40858 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 3921888 is about 1980.3757219275. The cubic root of 3921888 is about 157.7000129611.

The spelling of 3921888 in words is "three million, nine hundred twenty-one thousand, eight hundred eighty-eight".