64391894 has 16 divisors (see below), whose sum is σ = 113079456. Its totient is φ = 26923200.

The previous prime is 64391857. The next prime is 64391897. The reversal of 64391894 is 49819346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64391897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55517 + ... + 56664.

It is an arithmetic number, because the mean of its divisors is an integer number (7067466).

Almost surely, 2^64391894 is an apocalyptic number.

64391894 is a deficient number, since it is larger than the sum of its proper divisors (48687562).

64391894 is a wasteful number, since it uses less digits than its factorization.

64391894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112231.

The product of its digits is 186624, while the sum is 44.

The square root of 64391894 is about 8024.4559940223. The cubic root of 64391894 is about 400.8147850199.

The spelling of 64391894 in words is "sixty-four million, three hundred ninety-one thousand, eight hundred ninety-four".