2689812906 has 16 divisors (see below), whose sum is σ = 5868682848. Its totient is φ = 815094800.

The previous prime is 2689812899. The next prime is 2689812907. The reversal of 2689812906 is 6092189862.

It is not an unprimeable number, because it can be changed into a prime (2689812907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20377305 + ... + 20377436.

It is an arithmetic number, because the mean of its divisors is an integer number (366792678).

Almost surely, 2^2689812906 is an apocalyptic number.

2689812906 is an abundant number, since it is smaller than the sum of its proper divisors (3178869942).

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

2689812906 is a wasteful number, since it uses less digits than its factorization.

2689812906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40754757.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 2689812906 is about 51863.4062321402. The cubic root of 2689812906 is about 1390.7231725069.

The spelling of 2689812906 in words is "two billion, six hundred eighty-nine million, eight hundred twelve thousand, nine hundred six".