2989847840 has 48 divisors (see below), whose sum is σ = 8072592192. Its totient is φ = 1025090304.

The previous prime is 2989847837. The next prime is 2989847849. The reversal of 2989847840 is 487489892.

It is a self number, because there is not a number n which added to its sum of digits gives 2989847840.

It is not an unprimeable number, because it can be changed into a prime (2989847849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1333634 + ... + 1335873.

It is an arithmetic number, because the mean of its divisors is an integer number (168179004).

Almost surely, 2^2989847840 is an apocalyptic number.

2989847840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2989847840 is an abundant number, since it is smaller than the sum of its proper divisors (5082744352).

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

2989847840 is a wasteful number, since it uses less digits than its factorization.

2989847840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669529 (or 2669521 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 59.

The square root of 2989847840 is about 54679.5010950173. The cubic root of 2989847840 is about 1440.6208485410.

The spelling of 2989847840 in words is "two billion, nine hundred eighty-nine million, eight hundred forty-seven thousand, eight hundred forty".