1632648389 has 4 divisors (see below), whose sum is σ = 1633816800. Its totient is φ = 1631479980.

The previous prime is 1632648379. The next prime is 1632648481. The reversal of 1632648389 is 9838462361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1632648389 - 2²⁰ = 1631599813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1632648319) 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 3 ways as a sum of consecutive naturals, for example, 582107 + ... + 584904.

It is an arithmetic number, because the mean of its divisors is an integer number (408454200).

Almost surely, 2^1632648389 is an apocalyptic number.

It is an amenable number.

1632648389 is a deficient number, since it is larger than the sum of its proper divisors (1168411).

1632648389 is a wasteful number, since it uses less digits than its factorization.

1632648389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168410.

The product of its digits is 1492992, while the sum is 50.

The square root of 1632648389 is about 40406.0439662187. The cubic root of 1632648389 is about 1177.5089624169.

The spelling of 1632648389 in words is "one billion, six hundred thirty-two million, six hundred forty-eight thousand, three hundred eighty-nine".