3969920 has 32 divisors (see below), whose sum is σ = 9492120. Its totient is φ = 1587712.

The previous prime is 3969899. The next prime is 3969923. The reversal of 3969920 is 299693.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969923) 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, 2462 + ... + 3741.

Almost surely, 2^3969920 is an apocalyptic number.

It is an amenable number.

3969920 is an abundant number, since it is smaller than the sum of its proper divisors (5522200).

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

3969920 is an equidigital number, since it uses as much as digits as its factorization.

3969920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222 (or 6210 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 3969920 is about 1992.4658089915. The cubic root of 3969920 is about 158.3411950544.

The spelling of 3969920 in words is "three million, nine hundred sixty-nine thousand, nine hundred twenty".