3949664 has 12 divisors (see below), whose sum is σ = 7775964. Its totient is φ = 1974816.

The previous prime is 3949657. The next prime is 3949669. The reversal of 3949664 is 4669493.

It is a super-3 number, since 3×3949664³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61682 + ... + 61745.

It is an arithmetic number, because the mean of its divisors is an integer number (647997).

Almost surely, 2^3949664 is an apocalyptic number.

It is an amenable number.

3949664 is a deficient number, since it is larger than the sum of its proper divisors (3826300).

3949664 is a wasteful number, since it uses less digits than its factorization.

3949664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123437 (or 123429 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 3949664 is about 1987.3761596638. The cubic root of 3949664 is about 158.0714306085.

The spelling of 3949664 in words is "three million, nine hundred forty-nine thousand, six hundred sixty-four".