64906238 has 32 divisors (see below), whose sum is σ = 106142400. Its totient is φ = 29652480.

The previous prime is 64906217. The next prime is 64906243. The reversal of 64906238 is 83260946.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326063 + ... + 326261.

It is an arithmetic number, because the mean of its divisors is an integer number (3316950).

Almost surely, 2^64906238 is an apocalyptic number.

64906238 is a deficient number, since it is larger than the sum of its proper divisors (41236162).

64906238 is a wasteful number, since it uses less digits than its factorization.

64906238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 64906238 is about 8056.4407774153. The cubic root of 64906238 is about 401.8791539599.

The spelling of 64906238 in words is "sixty-four million, nine hundred six thousand, two hundred thirty-eight".