1989917336 has 16 divisors (see below), whose sum is σ = 4070285640. Its totient is φ = 904507840.

The previous prime is 1989917323. The next prime is 1989917339. The reversal of 1989917336 is 6337199891.

It is a super-2 number, since 2×1989917336² = 7919542008226673792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989917339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11306261 + ... + 11306436.

Almost surely, 2^1989917336 is an apocalyptic number.

It is an amenable number.

1989917336 is an abundant number, since it is smaller than the sum of its proper divisors (2080368304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1989917336 is a wasteful number, since it uses less digits than its factorization.

1989917336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22612714 (or 22612710 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 56.

The square root of 1989917336 is about 44608.4895059225. The cubic root of 1989917336 is about 1257.8002552468.

The spelling of 1989917336 in words is "one billion, nine hundred eighty-nine million, nine hundred seventeen thousand, three hundred thirty-six".