64642298 has 16 divisors (see below), whose sum is σ = 112907520. Its totient is φ = 27180816.

The previous prime is 64642297. The next prime is 64642301. The reversal of 64642298 is 89224646.

It is not an unprimeable number, because it can be changed into a prime (64642297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42818 + ... + 44301.

It is an arithmetic number, because the mean of its divisors is an integer number (7056720).

Almost surely, 2^64642298 is an apocalyptic number.

64642298 is a deficient number, since it is larger than the sum of its proper divisors (48265222).

64642298 is a wasteful number, since it uses less digits than its factorization.

64642298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87181.

The product of its digits is 165888, while the sum is 41.

The square root of 64642298 is about 8040.0434078430. The cubic root of 64642298 is about 401.3336692074. Note that the first 3 decimals are identical.

The spelling of 64642298 in words is "sixty-four million, six hundred forty-two thousand, two hundred ninety-eight".