1989148604 has 12 divisors (see below), whose sum is σ = 3593300928. Its totient is φ = 962491200.

The previous prime is 1989148591. The next prime is 1989148607. The reversal of 1989148604 is 4068419891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989148607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8020637 + ... + 8020884.

It is an arithmetic number, because the mean of its divisors is an integer number (299441744).

Almost surely, 2^1989148604 is an apocalyptic number.

It is an amenable number.

1989148604 is a deficient number, since it is larger than the sum of its proper divisors (1604152324).

1989148604 is a wasteful number, since it uses less digits than its factorization.

1989148604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16041556 (or 16041554 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 1989148604 is about 44599.8722419695. The cubic root of 1989148604 is about 1257.6382659645.

The spelling of 1989148604 in words is "one billion, nine hundred eighty-nine million, one hundred forty-eight thousand, six hundred four".