2105615828 has 12 divisors (see below), whose sum is σ = 3685153332. Its totient is φ = 1052714880.

The previous prime is 2105615761. The next prime is 2105615833. The reversal of 2105615828 is 8285165012.

It can be written as a sum of positive squares in 2 ways, for example, as 1143251344 + 962364484 = 33812^2 + 31022^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2105615791 and 2105615800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64226 + ... + 91302.

It is an arithmetic number, because the mean of its divisors is an integer number (307096111).

Almost surely, 2^2105615828 is an apocalyptic number.

It is an amenable number.

2105615828 is a deficient number, since it is larger than the sum of its proper divisors (1579537504).

2105615828 is a wasteful number, since it uses less digits than its factorization.

2105615828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46522 (or 46520 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 2105615828 is about 45886.9897465502. The cubic root of 2105615828 is about 1281.7196588470.

The spelling of 2105615828 in words is "two billion, one hundred five million, six hundred fifteen thousand, eight hundred twenty-eight".