3988564 has 6 divisors (see below), whose sum is σ = 6979994. Its totient is φ = 1994280.

The previous prime is 3988541. The next prime is 3988583. The reversal of 3988564 is 4658893.

It can be written as a sum of positive squares in only one way, i.e., 3640464 + 348100 = 1908^2 + 590^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3988564.

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, 498567 + ... + 498574.

Almost surely, 2^3988564 is an apocalyptic number.

It is an amenable number.

3988564 is a deficient number, since it is larger than the sum of its proper divisors (2991430).

3988564 is a wasteful number, since it uses less digits than its factorization.

3988564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997145 (or 997143 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 3988564 is about 1997.1389536034. The cubic root of 3988564 is about 158.5886814779.

It can be divided in two parts, 3 and 988564, that multiplied together give a palindrome (2965692).

The spelling of 3988564 in words is "three million, nine hundred eighty-eight thousand, five hundred sixty-four".