2891688402 has 16 divisors (see below), whose sum is σ = 5784993792. Its totient is φ = 963626640.

The previous prime is 2891688391. The next prime is 2891688407. The reversal of 2891688402 is 2048861982.

It is a super-2 number, since 2×2891688402² = 16723723628522627208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2891688407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43474 + ... + 87597.

It is an arithmetic number, because the mean of its divisors is an integer number (361562112).

Almost surely, 2^2891688402 is an apocalyptic number.

2891688402 is an abundant number, since it is smaller than the sum of its proper divisors (2893305390).

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

2891688402 is a wasteful number, since it uses less digits than its factorization.

2891688402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134753.

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 2891688402 is about 53774.4214473759. The cubic root of 2891688402 is about 1424.6794645009.

The spelling of 2891688402 in words is "two billion, eight hundred ninety-one million, six hundred eighty-eight thousand, four hundred two".