64438886 has 4 divisors (see below), whose sum is σ = 96658332. Its totient is φ = 32219442.

The previous prime is 64438879. The next prime is 64438901. The reversal of 64438886 is 68883446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68883446 = 2 ⋅34441723.

It is a self number, because there is not a number n which added to its sum of digits gives 64438886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16109720 + ... + 16109723.

It is an arithmetic number, because the mean of its divisors is an integer number (24164583).

Almost surely, 2^64438886 is an apocalyptic number.

64438886 is a deficient number, since it is larger than the sum of its proper divisors (32219446).

64438886 is a wasteful number, since it uses less digits than its factorization.

64438886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32219445.

The product of its digits is 884736, while the sum is 47.

The square root of 64438886 is about 8027.3835089648. The cubic root of 64438886 is about 400.9122636891.

The spelling of 64438886 in words is "sixty-four million, four hundred thirty-eight thousand, eight hundred eighty-six".