1869216489 has 24 divisors (see below), whose sum is σ = 3192096960. Its totient is φ = 1031290848.

The previous prime is 1869216469. The next prime is 1869216497. The reversal of 1869216489 is 9846129681.

It is not a de Polignac number, because 1869216489 - 2⁵ = 1869216457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1869216439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509727 + ... + 513380.

It is an arithmetic number, because the mean of its divisors is an integer number (133004040).

Almost surely, 2^1869216489 is an apocalyptic number.

It is an amenable number.

1869216489 is a deficient number, since it is larger than the sum of its proper divisors (1322880471).

1869216489 is a wasteful number, since it uses less digits than its factorization.

1869216489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023149 (or 1023146 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 1869216489 is about 43234.4363788867. The cubic root of 1869216489 is about 1231.8368767079.

The spelling of 1869216489 in words is "one billion, eight hundred sixty-nine million, two hundred sixteen thousand, four hundred eighty-nine".