3928664 has 8 divisors (see below), whose sum is σ = 7366260. Its totient is φ = 1964328.

The previous prime is 3928663. The next prime is 3928667. The reversal of 3928664 is 4668293.

3928664 = 488² + 489² + ... + 503².

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

It is a d-powerful number, because it can be written as 3⁹ + 9² + 2¹⁷ + 8⁷ + 6² + 6⁸ + 4⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245534 + ... + 245549.

Almost surely, 2^3928664 is an apocalyptic number.

It is an amenable number.

3928664 is a deficient number, since it is larger than the sum of its proper divisors (3437596).

3928664 is a wasteful number, since it uses less digits than its factorization.

3928664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491089 (or 491085 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 3928664 is about 1982.0857700917. The cubic root of 3928664 is about 157.7907822089.

The spelling of 3928664 in words is "three million, nine hundred twenty-eight thousand, six hundred sixty-four".