7889664 has 36 divisors (see below), whose sum is σ = 21000056. Its totient is φ = 2629632.

The previous prime is 7889663. The next prime is 7889669. The reversal of 7889664 is 4669887.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7889663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4369 + ... + 5904.

Almost surely, 2^7889664 is an apocalyptic number.

It is an amenable number.

7889664 is an abundant number, since it is smaller than the sum of its proper divisors (13110392).

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

7889664 is a wasteful number, since it uses less digits than its factorization.

7889664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292 (or 10278 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 7889664 is about 2808.8545708171. The cubic root of 7889664 is about 199.0762735488.

The spelling of 7889664 in words is "seven million, eight hundred eighty-nine thousand, six hundred sixty-four".