2645205728 has 48 divisors (see below), whose sum is σ = 5716158336. Its totient is φ = 1194963840.

The previous prime is 2645205691. The next prime is 2645205737. The reversal of 2645205728 is 8275025462.

It is a super-2 number, since 2×2645205728² = 13994226686888019968, which contains 22 as substring.

It is a congruent number.

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, 34325 + ... + 80427.

It is an arithmetic number, because the mean of its divisors is an integer number (119086632).

Almost surely, 2^2645205728 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 2645205728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2858079168).

2645205728 is an abundant number, since it is smaller than the sum of its proper divisors (3070952608).

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

2645205728 is a wasteful number, since it uses less digits than its factorization.

2645205728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46287 (or 46279 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 41.

The square root of 2645205728 is about 51431.5635383565. The cubic root of 2645205728 is about 1382.9924784366.

The spelling of 2645205728 in words is "two billion, six hundred forty-five million, two hundred five thousand, seven hundred twenty-eight".