64439914 has 64 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 23647680.

The previous prime is 64439899. The next prime is 64439939. The reversal of 64439914 is 41993446.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209749 + ... + 210055.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^64439914 is an apocalyptic number.

64439914 is a deficient number, since it is larger than the sum of its proper divisors (63293846).

64439914 is a wasteful number, since it uses less digits than its factorization.

64439914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its digits is 93312, while the sum is 40.

The square root of 64439914 is about 8027.4475395358. The cubic root of 64439914 is about 400.9143956089.

The spelling of 64439914 in words is "sixty-four million, four hundred thirty-nine thousand, nine hundred fourteen".