64439042 has 8 divisors (see below), whose sum is σ = 97823376. Its totient is φ = 31831252.

The previous prime is 64439029. The next prime is 64439047. The reversal of 64439042 is 24093446.

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

It is not an unprimeable number, because it can be changed into a prime (64439047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193928 + ... + 194259.

It is an arithmetic number, because the mean of its divisors is an integer number (12227922).

Almost surely, 2^64439042 is an apocalyptic number.

64439042 is a deficient number, since it is larger than the sum of its proper divisors (33384334).

64439042 is a wasteful number, since it uses less digits than its factorization.

64439042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388272.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 64439042 is about 8027.3932256991. The cubic root of 64439042 is about 400.9125872114.

The spelling of 64439042 in words is "sixty-four million, four hundred thirty-nine thousand, forty-two".