3921016 has 32 divisors (see below), whose sum is σ = 8495280. Its totient is φ = 1676800.

The previous prime is 3920989. The next prime is 3921023. The reversal of 3921016 is 6101293.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 186 + ... + 2806.

Almost surely, 2^3921016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4247640).

3921016 is an abundant number, since it is smaller than the sum of its proper divisors (4574264).

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

3921016 is a wasteful number, since it uses less digits than its factorization.

3921016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 3921016 is about 1980.1555494455. The cubic root of 3921016 is about 157.6883243217.

The spelling of 3921016 in words is "three million, nine hundred twenty-one thousand, sixteen".