3949688 has 8 divisors (see below), whose sum is σ = 7405680. Its totient is φ = 1974840.

The previous prime is 3949669. The next prime is 3949703. The reversal of 3949688 is 8869493.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×3949688⁴ (a number of 27 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246848 + ... + 246863.

It is an arithmetic number, because the mean of its divisors is an integer number (925710).

Almost surely, 2^3949688 is an apocalyptic number.

It is an amenable number.

3949688 is a deficient number, since it is larger than the sum of its proper divisors (3455992).

3949688 is a wasteful number, since it uses less digits than its factorization.

3949688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493717 (or 493713 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 3949688 is about 1987.3821977667. The cubic root of 3949688 is about 158.0717507797.

The spelling of 3949688 in words is "three million, nine hundred forty-nine thousand, six hundred eighty-eight".