1638424472 has 16 divisors (see below), whose sum is σ = 3072738240. Its totient is φ = 819027616.

The previous prime is 1638424429. The next prime is 1638424477. The reversal of 1638424472 is 2744248361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638424477) 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, 19193 + ... + 60375.

It is an arithmetic number, because the mean of its divisors is an integer number (192046140).

Almost surely, 2^1638424472 is an apocalyptic number.

It is an amenable number.

1638424472 is a deficient number, since it is larger than the sum of its proper divisors (1434313768).

1638424472 is a wasteful number, since it uses less digits than its factorization.

1638424472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46162 (or 46158 counting only the distinct ones).

The product of its digits is 258048, while the sum is 41.

The square root of 1638424472 is about 40477.4563430065. The cubic root of 1638424472 is about 1178.8959490421.

The spelling of 1638424472 in words is "one billion, six hundred thirty-eight million, four hundred twenty-four thousand, four hundred seventy-two".