1989653912 has 32 divisors (see below), whose sum is σ = 3783780000. Its totient is φ = 980726784.

The previous prime is 1989653891. The next prime is 1989653969. The reversal of 1989653912 is 2193569891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199214 + ... + 208962.

It is an arithmetic number, because the mean of its divisors is an integer number (118243125).

Almost surely, 2^1989653912 is an apocalyptic number.

It is an amenable number.

1989653912 is a deficient number, since it is larger than the sum of its proper divisors (1794126088).

1989653912 is a wasteful number, since it uses less digits than its factorization.

1989653912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10115 (or 10111 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 53.

The square root of 1989653912 is about 44605.5367863677. The cubic root of 1989653912 is about 1257.7447505297.

The spelling of 1989653912 in words is "one billion, nine hundred eighty-nine million, six hundred fifty-three thousand, nine hundred twelve".