64864390 has 8 divisors (see below), whose sum is σ = 116755920. Its totient is φ = 25945752.

The previous prime is 64864351. The next prime is 64864433. The reversal of 64864390 is 9346846.

64864390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 3243210 + ... + 3243229.

It is an arithmetic number, because the mean of its divisors is an integer number (14594490).

Almost surely, 2^64864390 is an apocalyptic number.

64864390 is a deficient number, since it is larger than the sum of its proper divisors (51891530).

64864390 is a wasteful number, since it uses less digits than its factorization.

64864390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6486446.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 64864390 is about 8053.8431819846. The cubic root of 64864390 is about 401.7927654758.

The spelling of 64864390 in words is "sixty-four million, eight hundred sixty-four thousand, three hundred ninety".