1989735050 has 24 divisors (see below), whose sum is σ = 3734870700. Its totient is φ = 788590080.

The previous prime is 1989735017. The next prime is 1989735067. The reversal of 1989735050 is 505379891.

It can be written as a sum of positive squares in 6 ways, for example, as 431933089 + 1557801961 = 20783^2 + 39469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1989734986 and 1989735004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177095 + ... + 187994.

Almost surely, 2^1989735050 is an apocalyptic number.

1989735050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989735050 is a deficient number, since it is larger than the sum of its proper divisors (1745135650).

1989735050 is a wasteful number, since it uses less digits than its factorization.

1989735050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365210 (or 365205 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 1989735050 is about 44606.4462830206. The cubic root of 1989735050 is about 1257.7618472227.

The spelling of 1989735050 in words is "one billion, nine hundred eighty-nine million, seven hundred thirty-five thousand, fifty".