2688944458 has 4 divisors (see below), whose sum is σ = 4033416690. Its totient is φ = 1344472228.

The previous prime is 2688944399. The next prime is 2688944473. The reversal of 2688944458 is 8544498862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1996570489 + 692373969 = 44683^2 + 26313^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672236113 + ... + 672236116.

Almost surely, 2^2688944458 is an apocalyptic number.

2688944458 is a deficient number, since it is larger than the sum of its proper divisors (1344472232).

2688944458 is a wasteful number, since it uses less digits than its factorization.

2688944458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344472231.

The product of its digits is 17694720, while the sum is 58.

The square root of 2688944458 is about 51855.0331019082. The cubic root of 2688944458 is about 1390.5734841821.

The spelling of 2688944458 in words is "two billion, six hundred eighty-eight million, nine hundred forty-four thousand, four hundred fifty-eight".