64838817 has 24 divisors (see below), whose sum is σ = 99403200. Its totient is φ = 40638048.

The previous prime is 64838801. The next prime is 64838821. The reversal of 64838817 is 71883846.

It is not a de Polignac number, because 64838817 - 2⁴ = 64838801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64838857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9559 + ... + 14867.

It is an arithmetic number, because the mean of its divisors is an integer number (4141800).

Almost surely, 2^64838817 is an apocalyptic number.

It is an amenable number.

64838817 is a deficient number, since it is larger than the sum of its proper divisors (34564383).

64838817 is a wasteful number, since it uses less digits than its factorization.

64838817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5397 (or 5394 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 64838817 is about 8052.2553983341. The cubic root of 64838817 is about 401.7399558268.

The spelling of 64838817 in words is "sixty-four million, eight hundred thirty-eight thousand, eight hundred seventeen".