9775864 has 16 divisors (see below), whose sum is σ = 20948400. Its totient is φ = 4189632.

The previous prime is 9775847. The next prime is 9775877. The reversal of 9775864 is 4685779.

It is a happy number.

9775864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87229 + ... + 87340.

It is an arithmetic number, because the mean of its divisors is an integer number (1309275).

Almost surely, 2^9775864 is an apocalyptic number.

It is an amenable number.

9775864 is an abundant number, since it is smaller than the sum of its proper divisors (11172536).

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

9775864 is a wasteful number, since it uses less digits than its factorization.

9775864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174582 (or 174578 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The square root of 9775864 is about 3126.6378108121. The cubic root of 9775864 is about 213.8216699350.

The spelling of 9775864 in words is "nine million, seven hundred seventy-five thousand, eight hundred sixty-four".