1638630483 has 8 divisors (see below), whose sum is σ = 2496960768. Its totient is φ = 936360264.

The previous prime is 1638630473. The next prime is 1638630557. The reversal of 1638630483 is 3840368361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1638630483 - 2¹⁰ = 1638629459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1638630473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39014991 + ... + 39015032.

It is an arithmetic number, because the mean of its divisors is an integer number (312120096).

Almost surely, 2^1638630483 is an apocalyptic number.

1638630483 is a deficient number, since it is larger than the sum of its proper divisors (858330285).

1638630483 is an equidigital number, since it uses as much as digits as its factorization.

1638630483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78030033.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 1638630483 is about 40480.0010251976. The cubic root of 1638630483 is about 1178.9453573526.

The spelling of 1638630483 in words is "one billion, six hundred thirty-eight million, six hundred thirty thousand, four hundred eighty-three".