3929216 has 16 divisors (see below), whose sum is σ = 7827990. Its totient is φ = 1964544.

The previous prime is 3929213. The next prime is 3929221. The reversal of 3929216 is 6129293.

3929216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 87616 = 1960^2 + 296^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3929213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15221 + ... + 15476.

Almost surely, 2^3929216 is an apocalyptic number.

It is an amenable number.

3929216 is a deficient number, since it is larger than the sum of its proper divisors (3898774).

3929216 is an equidigital number, since it uses as much as digits as its factorization.

3929216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30711 (or 30699 counting only the distinct ones).

The product of its digits is 5832, while the sum is 32.

The square root of 3929216 is about 1982.2250124544. The cubic root of 3929216 is about 157.7981720351.

The spelling of 3929216 in words is "three million, nine hundred twenty-nine thousand, two hundred sixteen".