1983989764 has 9 divisors (see below), whose sum is σ = 3472137991. Its totient is φ = 991950340.

The previous prime is 1983989741. The next prime is 1983989767. The reversal of 1983989764 is 4679893891.

The square root of 1983989764 is 44542.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1983989696 and 1983989705.

It is not an unprimeable number, because it can be changed into a prime (1983989767) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 77949 + ... + 100219.

Almost surely, 2^1983989764 is an apocalyptic number.

1983989764 is the 44542-nd square number.

It is an amenable number.

1983989764 is a deficient number, since it is larger than the sum of its proper divisors (1488148227).

1983989764 is an frugal number, since it uses more digits than its factorization.

1983989764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44546 (or 22273 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 64.

The cubic root of 1983989764 is about 1256.5500999870.

Multiplying 1983989764 by its sum of digits (64), we get a square (126975344896 = 356336²).

The spelling of 1983989764 in words is "one billion, nine hundred eighty-three million, nine hundred eighty-nine thousand, seven hundred sixty-four".