19989488 has 10 divisors (see below), whose sum is σ = 38729664. Its totient is φ = 9994736.

The previous prime is 19989481. The next prime is 19989493. The reversal of 19989488 is 88498991.

It is a super-5 number, since 5×19989488⁵ (a number of 38 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19989481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624656 + ... + 624687.

Almost surely, 2^19989488 is an apocalyptic number.

It is an amenable number.

19989488 is a deficient number, since it is larger than the sum of its proper divisors (18740176).

19989488 is a wasteful number, since it uses less digits than its factorization.

19989488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249351 (or 1249345 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 56.

The square root of 19989488 is about 4470.9605231986. The cubic root of 19989488 is about 271.3941967285.

The spelling of 19989488 in words is "nineteen million, nine hundred eighty-nine thousand, four hundred eighty-eight".