1830736989 has 12 divisors (see below), whose sum is σ = 2659010172. Its totient is φ = 1213747200.

The previous prime is 1830736933. The next prime is 1830736991. The reversal of 1830736989 is 9896370381.

It can be written as a sum of positive squares in 2 ways, for example, as 831860964 + 998876025 = 28842^2 + 31605^2 .

It is not a de Polignac number, because 1830736989 - 2⁷ = 1830736861 is a prime.

It is a super-2 number, since 2×1830736989² = 6703195845785572242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830736909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560292 + ... + 563549.

It is an arithmetic number, because the mean of its divisors is an integer number (221584181).

Almost surely, 2^1830736989 is an apocalyptic number.

It is an amenable number.

1830736989 is a deficient number, since it is larger than the sum of its proper divisors (828273183).

1830736989 is a wasteful number, since it uses less digits than its factorization.

1830736989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124028 (or 1124025 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1830736989 is about 42787.1124171753. The cubic root of 1830736989 is about 1223.3253783550.

The spelling of 1830736989 in words is "one billion, eight hundred thirty million, seven hundred thirty-six thousand, nine hundred eighty-nine".