2689839880 has 384 divisors, whose sum is σ = 8295436800. Its totient is φ = 762753024.

The previous prime is 2689839863. The next prime is 2689839883. The reversal of 2689839880 is 889389862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2689839883) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30222876 + ... + 30222964.

It is an arithmetic number, because the mean of its divisors is an integer number (21602700).

Almost surely, 2^2689839880 is an apocalyptic number.

2689839880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2689839880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4147718400).

2689839880 is an abundant number, since it is smaller than the sum of its proper divisors (5605596920).

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

2689839880 is a wasteful number, since it uses less digits than its factorization.

2689839880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 61.

The square root of 2689839880 is about 51863.6662799691. Note that the first 3 decimals coincide. The cubic root of 2689839880 is about 1390.7278213112.

The spelling of 2689839880 in words is "two billion, six hundred eighty-nine million, eight hundred thirty-nine thousand, eight hundred eighty".