64860638 has 4 divisors (see below), whose sum is σ = 97290960. Its totient is φ = 32430318.

The previous prime is 64860637. The next prime is 64860643. The reversal of 64860638 is 83606846.

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

It is a junction number, because it is equal to n+sod(n) for n = 64860595 and 64860604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64860637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16215158 + ... + 16215161.

It is an arithmetic number, because the mean of its divisors is an integer number (24322740).

Almost surely, 2^64860638 is an apocalyptic number.

64860638 is a deficient number, since it is larger than the sum of its proper divisors (32430322).

64860638 is a wasteful number, since it uses less digits than its factorization.

64860638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32430321.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 64860638 is about 8053.6102463429. The cubic root of 64860638 is about 401.7850182587.

The spelling of 64860638 in words is "sixty-four million, eight hundred sixty thousand, six hundred thirty-eight".