64840822 has 16 divisors (see below), whose sum is σ = 103306320. Its totient is φ = 30417408.

The previous prime is 64840817. The next prime is 64840829. The reversal of 64840822 is 22804846.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64840829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8629 + ... + 14287.

It is an arithmetic number, because the mean of its divisors is an integer number (6456645).

Almost surely, 2^64840822 is an apocalyptic number.

64840822 is a deficient number, since it is larger than the sum of its proper divisors (38465498).

64840822 is a wasteful number, since it uses less digits than its factorization.

64840822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015.

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 64840822 is about 8052.3798966517. The cubic root of 64840822 is about 401.7440967634.

The spelling of 64840822 in words is "sixty-four million, eight hundred forty thousand, eight hundred twenty-two".