1638044084 has 24 divisors (see below), whose sum is σ = 2992973760. Its totient is φ = 782950784.

The previous prime is 1638044071. The next prime is 1638044087. The reversal of 1638044084 is 4804408361.

It is a super-2 number, since 2×1638044084² = 5366376842254798112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638044087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191687 + ... + 200049.

It is an arithmetic number, because the mean of its divisors is an integer number (124707240).

Almost surely, 2^1638044084 is an apocalyptic number.

It is an amenable number.

1638044084 is a deficient number, since it is larger than the sum of its proper divisors (1354929676).

1638044084 is a wasteful number, since it uses less digits than its factorization.

1638044084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10519 (or 10517 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 1638044084 is about 40472.7573066130. The cubic root of 1638044084 is about 1178.8047084248.

The spelling of 1638044084 in words is "one billion, six hundred thirty-eight million, forty-four thousand, eighty-four".