1638434483 has 32 divisors (see below), whose sum is σ = 2017382400. Its totient is φ = 1298778624.

The previous prime is 1638434459. The next prime is 1638434587. The reversal of 1638434483 is 3844348361.

It is a cyclic number.

It is not a de Polignac number, because 1638434483 - 2⁶ = 1638434419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1638436483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3731978 + ... + 3732416.

It is an arithmetic number, because the mean of its divisors is an integer number (63043200).

Almost surely, 2^1638434483 is an apocalyptic number.

1638434483 is a deficient number, since it is larger than the sum of its proper divisors (378947917).

1638434483 is a wasteful number, since it uses less digits than its factorization.

1638434483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 663552, while the sum is 44.

The square root of 1638434483 is about 40477.5800042443. The cubic root of 1638434483 is about 1178.8983501096.

The spelling of 1638434483 in words is "one billion, six hundred thirty-eight million, four hundred thirty-four thousand, four hundred eighty-three".