64995838 has 16 divisors (see below), whose sum is σ = 102273696. Its totient is φ = 30919680.

The previous prime is 64995817. The next prime is 64995851. The reversal of 64995838 is 83859946.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 5218 + ... + 12538.

It is an arithmetic number, because the mean of its divisors is an integer number (6392106).

Almost surely, 2^64995838 is an apocalyptic number.

64995838 is a deficient number, since it is larger than the sum of its proper divisors (37277858).

64995838 is a wasteful number, since it uses less digits than its factorization.

64995838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539.

The product of its digits is 1866240, while the sum is 52.

The square root of 64995838 is about 8061.9996278839. Note that the first 3 decimals coincide. The cubic root of 64995838 is about 402.0639940036.

The spelling of 64995838 in words is "sixty-four million, nine hundred ninety-five thousand, eight hundred thirty-eight".