2809923648 has 56 divisors (see below), whose sum is σ = 8496677952. Its totient is φ = 802834944.

The previous prime is 2809923637. The next prime is 2809923667. The reversal of 2809923648 is 8463299082.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 2809923648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044015 + ... + 1046702.

It is an arithmetic number, because the mean of its divisors is an integer number (151726392).

Almost surely, 2^2809923648 is an apocalyptic number.

2809923648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2809923648 is an abundant number, since it is smaller than the sum of its proper divisors (5686754304).

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

2809923648 is a wasteful number, since it uses less digits than its factorization.

2809923648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090739 (or 2090729 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 2809923648 is about 53008.7129441944. The cubic root of 2809923648 is about 1411.1229000818.

The spelling of 2809923648 in words is "two billion, eight hundred nine million, nine hundred twenty-three thousand, six hundred forty-eight".