2989780893 has 36 divisors (see below), whose sum is σ = 4875219804. Its totient is φ = 1762992000.

The previous prime is 2989780867. The next prime is 2989780901. The reversal of 2989780893 is 3980879892.

It can be written as a sum of positive squares in 2 ways, for example, as 1539542169 + 1450238724 = 39237^2 + 38082^2 .

It is not a de Polignac number, because 2989780893 - 2¹⁰ = 2989779869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2989780893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2989780193) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3193 + ... + 77393.

Almost surely, 2^2989780893 is an apocalyptic number.

It is an amenable number.

2989780893 is a deficient number, since it is larger than the sum of its proper divisors (1885438911).

2989780893 is a wasteful number, since it uses less digits than its factorization.

2989780893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74266 (or 74252 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The square root of 2989780893 is about 54678.8889151929. Note that the first 3 decimals coincide. The cubic root of 2989780893 is about 1440.6100959355.

The spelling of 2989780893 in words is "two billion, nine hundred eighty-nine million, seven hundred eighty thousand, eight hundred ninety-three".