2805642688 has 28 divisors (see below), whose sum is σ = 5650552072. Its totient is φ = 1381881600.

The previous prime is 2805642673. The next prime is 2805642689. The reversal of 2805642688 is 8862465082.

It is a happy number.

2805642688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805642689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322863 + ... + 331438.

Almost surely, 2^2805642688 is an apocalyptic number.

It is an amenable number.

2805642688 is an abundant number, since it is smaller than the sum of its proper divisors (2844909384).

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

2805642688 is an equidigital number, since it uses as much as digits as its factorization.

2805642688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654380 (or 654370 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 49.

The square root of 2805642688 is about 52968.3177758176. The cubic root of 2805642688 is about 1410.4059136820.

The spelling of 2805642688 in words is "two billion, eight hundred five million, six hundred forty-two thousand, six hundred eighty-eight".