1989688502 has 8 divisors (see below), whose sum is σ = 2995154712. Its totient is φ = 991303600.

The previous prime is 1989688501. The next prime is 1989688513. The reversal of 1989688502 is 2058869891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989688501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769624 + ... + 1770747.

It is an arithmetic number, because the mean of its divisors is an integer number (374394339).

Almost surely, 2^1989688502 is an apocalyptic number.

1989688502 is a deficient number, since it is larger than the sum of its proper divisors (1005466210).

1989688502 is a wasteful number, since it uses less digits than its factorization.

1989688502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540654.

The product of its (nonzero) digits is 2488320, while the sum is 56.

The square root of 1989688502 is about 44605.9245168173. The cubic root of 1989688502 is about 1257.7520390902.

The spelling of 1989688502 in words is "one billion, nine hundred eighty-nine million, six hundred eighty-eight thousand, five hundred two".