2684689920 has 600 divisors, whose sum is σ = 10668114072. Its totient is φ = 644751360.

The previous prime is 2684689901. The next prime is 2684689951. The reversal of 2684689920 is 299864862.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 25090507 + ... + 25090613.

Almost surely, 2^2684689920 is an apocalyptic number.

2684689920 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 2684689920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5334057036).

2684689920 is an abundant number, since it is smaller than the sum of its proper divisors (7983424152).

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

2684689920 is a wasteful number, since it uses less digits than its factorization.

2684689920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 2684689920 is about 51813.9934766661. The cubic root of 2684689920 is about 1389.8396930528.

The spelling of 2684689920 in words is "two billion, six hundred eighty-four million, six hundred eighty-nine thousand, nine hundred twenty".