2989797408 has 144 divisors (see below), whose sum is σ = 9380059416. Its totient is φ = 897454080.

The previous prime is 2989797401. The next prime is 2989797431. The reversal of 2989797408 is 8047979892.

It can be written as a sum of positive squares in 4 ways, for example, as 1569110544 + 1420686864 = 39612^2 + 37692^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×2989797408³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2989797401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143766 + ... + 163242.

Almost surely, 2^2989797408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2989797408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4690029708).

2989797408 is an abundant number, since it is smaller than the sum of its proper divisors (6390262008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2989797408 is a wasteful number, since it uses less digits than its factorization.

2989797408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19547 (or 19536 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The square root of 2989797408 is about 54679.0399330493. The cubic root of 2989797408 is about 1440.6127484857.

The spelling of 2989797408 in words is "two billion, nine hundred eighty-nine million, seven hundred ninety-seven thousand, four hundred eight".