64442894 has 4 divisors (see below), whose sum is σ = 96664344. Its totient is φ = 32221446.

The previous prime is 64442887. The next prime is 64442897. The reversal of 64442894 is 49824446.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64442897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16110722 + ... + 16110725.

It is an arithmetic number, because the mean of its divisors is an integer number (24166086).

Almost surely, 2^64442894 is an apocalyptic number.

64442894 is a deficient number, since it is larger than the sum of its proper divisors (32221450).

64442894 is a wasteful number, since it uses less digits than its factorization.

64442894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32221449.

The product of its digits is 221184, while the sum is 41.

The square root of 64442894 is about 8027.6331505619. The cubic root of 64442894 is about 400.9205755596.

The spelling of 64442894 in words is "sixty-four million, four hundred forty-two thousand, eight hundred ninety-four".