2891344690 has 16 divisors (see below), whose sum is σ = 5604760728. Its totient is φ = 1067573376.

The previous prime is 2891344681. The next prime is 2891344739. The reversal of 2891344690 is 964431982.

2891344690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2590911801 + 300432889 = 50901^2 + 17333^2 .

It is a super-2 number, since 2×2891344690² = 16719748232782392200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2891344690.

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, 11120427 + ... + 11120686.

Almost surely, 2^2891344690 is an apocalyptic number.

2891344690 is a deficient number, since it is larger than the sum of its proper divisors (2713416038).

2891344690 is a wasteful number, since it uses less digits than its factorization.

2891344690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22241133.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 2891344690 is about 53771.2254835242. The cubic root of 2891344690 is about 1424.6230154923.

The spelling of 2891344690 in words is "two billion, eight hundred ninety-one million, three hundred forty-four thousand, six hundred ninety".