2809539648 has 112 divisors (see below), whose sum is σ = 8482949760. Its totient is φ = 911181312.

The previous prime is 2809539643. The next prime is 2809539653. The reversal of 2809539648 is 8469359082.

It is an interprime number because it is at equal distance from previous prime (2809539643) and next prime (2809539653).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 2809539594 and 2809539603.

It is not an unprimeable number, because it can be changed into a prime (2809539643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41965 + ... + 85907.

Almost surely, 2^2809539648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2809539648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4241474880).

2809539648 is an abundant number, since it is smaller than the sum of its proper divisors (5673410112).

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

2809539648 is a wasteful number, since it uses less digits than its factorization.

2809539648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44001 (or 43985 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 2809539648 is about 53005.0907743775. The cubic root of 2809539648 is about 1411.0586164989.

The spelling of 2809539648 in words is "two billion, eight hundred nine million, five hundred thirty-nine thousand, six hundred forty-eight".