1638064 has 20 divisors (see below), whose sum is σ = 3260704. Its totient is φ = 796608.

The previous prime is 1638061. The next prime is 1638067. The reversal of 1638064 is 4608361.

It is an interprime number because it is at equal distance from previous prime (1638061) and next prime (1638067).

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1638061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792 + ... + 1975.

2^1638064 is an apocalyptic number.

It is an amenable number.

1638064 is a deficient number, since it is larger than the sum of its proper divisors (1622640).

1638064 is a wasteful number, since it uses less digits than its factorization.

1638064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1638064 is about 1279.8687432702. The cubic root of 1638064 is about 117.8809485866.

The spelling of 1638064 in words is "one million, six hundred thirty-eight thousand, sixty-four".