64864340 has 24 divisors (see below), whose sum is σ = 136692360. Its totient is φ = 25854848.

The previous prime is 64864313. The next prime is 64864351. The reversal of 64864340 is 4346846.

It is a happy number.

64864340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8042896 + 56821444 = 2836^2 + 7538^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64864340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (5695515).

Almost surely, 2^64864340 is an apocalyptic number.

It is an amenable number.

64864340 is an abundant number, since it is smaller than the sum of its proper divisors (71828020).

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

64864340 is a wasteful number, since it uses less digits than its factorization.

64864340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11371 (or 11369 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 64864340 is about 8053.8400778759. The cubic root of 64864340 is about 401.7926622366.

The spelling of 64864340 in words is "sixty-four million, eight hundred sixty-four thousand, three hundred forty".