2605971428 has 6 divisors (see below), whose sum is σ = 4560450006. Its totient is φ = 1302985712.

The previous prime is 2605971421. The next prime is 2605971437. The reversal of 2605971428 is 8241795062.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2307649444 + 298321984 = 48038^2 + 17272^2 .

It is not an unprimeable number, because it can be changed into a prime (2605971421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325746425 + ... + 325746432.

It is an arithmetic number, because the mean of its divisors is an integer number (760075001).

Almost surely, 2^2605971428 is an apocalyptic number.

It is an amenable number.

2605971428 is a deficient number, since it is larger than the sum of its proper divisors (1954478578).

2605971428 is a wasteful number, since it uses less digits than its factorization.

2605971428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651492861 (or 651492859 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 2605971428 is about 51048.7162228395. The cubic root of 2605971428 is about 1376.1207704807.

The spelling of 2605971428 in words is "two billion, six hundred five million, nine hundred seventy-one thousand, four hundred twenty-eight".