3969872 has 10 divisors (see below), whose sum is σ = 7691658. Its totient is φ = 1984928.

The previous prime is 3969871. The next prime is 3969899. The reversal of 3969872 is 2789693.

It can be written as a sum of positive squares in only one way, i.e., 2238016 + 1731856 = 1496^2 + 1316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124043 + ... + 124074.

Almost surely, 2^3969872 is an apocalyptic number.

It is an amenable number.

3969872 is a deficient number, since it is larger than the sum of its proper divisors (3721786).

3969872 is a wasteful number, since it uses less digits than its factorization.

3969872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248125 (or 248119 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 3969872 is about 1992.4537635790. The cubic root of 3969872 is about 158.3405568880.

The spelling of 3969872 in words is "three million, nine hundred sixty-nine thousand, eight hundred seventy-two".