3969880 has 32 divisors (see below), whose sum is σ = 9084240. Its totient is φ = 1560960.

The previous prime is 3969871. The next prime is 3969899. The reversal of 3969880 is 889693.

3969880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1627 + ... + 3253.

Almost surely, 2^3969880 is an apocalyptic number.

3969880 is the 1627-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3969880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4542120).

3969880 is an abundant number, since it is smaller than the sum of its proper divisors (5114360).

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

3969880 is a wasteful number, since it uses less digits than its factorization.

3969880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3969880 is about 1992.4557711528. The cubic root of 3969880 is about 158.3406632495.

The spelling of 3969880 in words is "three million, nine hundred sixty-nine thousand, eight hundred eighty".