2605906772 has 48 divisors (see below), whose sum is σ = 5493680640. Its totient is φ = 1056579552.

The previous prime is 2605906711. The next prime is 2605906789. The reversal of 2605906772 is 2776095062.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437003 + ... + 442925.

It is an arithmetic number, because the mean of its divisors is an integer number (114451680).

Almost surely, 2^2605906772 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 2605906772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2746840320).

2605906772 is an abundant number, since it is smaller than the sum of its proper divisors (2887773868).

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

2605906772 is a wasteful number, since it uses less digits than its factorization.

2605906772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780 (or 6778 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 2605906772 is about 51048.0829414778. The cubic root of 2605906772 is about 1376.1093895424.

The spelling of 2605906772 in words is "two billion, six hundred five million, nine hundred six thousand, seven hundred seventy-two".