64043138 has 16 divisors (see below), whose sum is σ = 97705440. Its totient is φ = 31479456.

The previous prime is 64043137. The next prime is 64043141. The reversal of 64043138 is 83134046.

It is a self number, because there is not a number n which added to its sum of digits gives 64043138.

It is not an unprimeable number, because it can be changed into a prime (64043137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28670 + ... + 30822.

It is an arithmetic number, because the mean of its divisors is an integer number (6106590).

Almost surely, 2^64043138 is an apocalyptic number.

64043138 is a deficient number, since it is larger than the sum of its proper divisors (33662302).

64043138 is a wasteful number, since it uses less digits than its factorization.

64043138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 64043138 is about 8002.6956708349. The cubic root of 64043138 is about 400.0898506490.

The spelling of 64043138 in words is "sixty-four million, forty-three thousand, one hundred thirty-eight".