2688998257 has 8 divisors (see below), whose sum is σ = 2935308672. Its totient is φ = 2442997200.

The previous prime is 2688998209. The next prime is 2688998261. The reversal of 2688998257 is 7528998862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2688998257 is a prime.

It is a super-2 number, since 2×2688998257² = 14461423252298076098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688996257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58969 + ... + 94102.

It is an arithmetic number, because the mean of its divisors is an integer number (366913584).

Almost surely, 2^2688998257 is an apocalyptic number.

It is an amenable number.

2688998257 is a deficient number, since it is larger than the sum of its proper divisors (246310415).

2688998257 is a wasteful number, since it uses less digits than its factorization.

2688998257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154679.

The product of its digits is 34836480, while the sum is 64.

The square root of 2688998257 is about 51855.5518435587. The cubic root of 2688998257 is about 1390.5827580769.

The spelling of 2688998257 in words is "two billion, six hundred eighty-eight million, nine hundred ninety-eight thousand, two hundred fifty-seven".