3969816 has 32 divisors (see below), whose sum is σ = 9979200. Its totient is φ = 1316000.

The previous prime is 3969811. The next prime is 3969821. The reversal of 3969816 is 6189693.

It is an interprime number because it is at equal distance from previous prime (3969811) and next prime (3969821).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969811) 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, 5695 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

Almost surely, 2^3969816 is an apocalyptic number.

It is an amenable number.

3969816 is an abundant number, since it is smaller than the sum of its proper divisors (6009384).

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

3969816 is a wasteful number, since it uses less digits than its factorization.

3969816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 915 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 3969816 is about 1992.4397105057. The cubic root of 3969816 is about 158.3398123541.

The spelling of 3969816 in words is "three million, nine hundred sixty-nine thousand, eight hundred sixteen".