1989992441 has 8 divisors (see below), whose sum is σ = 2108824200. Its totient is φ = 1874508160.

The previous prime is 1989992429. The next prime is 1989992561. The reversal of 1989992441 is 1442999891.

It can be written as a sum of positive squares in 4 ways, for example, as 92083216 + 1897909225 = 9596^2 + 43565^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1989992441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989992401) 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, 835646 + ... + 838023.

It is an arithmetic number, because the mean of its divisors is an integer number (263603025).

Almost surely, 2^1989992441 is an apocalyptic number.

It is an amenable number.

1989992441 is a deficient number, since it is larger than the sum of its proper divisors (118831759).

1989992441 is a wasteful number, since it uses less digits than its factorization.

1989992441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673739.

The product of its digits is 1679616, while the sum is 56.

The square root of 1989992441 is about 44609.3313220452. The cubic root of 1989992441 is about 1257.8160793379.

The spelling of 1989992441 in words is "one billion, nine hundred eighty-nine million, nine hundred ninety-two thousand, four hundred forty-one".