28688854937494 has 4 divisors (see below), whose sum is σ = 43033282406244. Its totient is φ = 14344427468746.

The previous prime is 28688854937473. The next prime is 28688854937497. The reversal of 28688854937494 is 49473945888682.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28688854937497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7172213734372 + ... + 7172213734375.

It is an arithmetic number, because the mean of its divisors is an integer number (10758320601561).

Almost surely, 2^{28688854937494} is an apocalyptic number.

28688854937494 is a deficient number, since it is larger than the sum of its proper divisors (14344427468750).

28688854937494 is a wasteful number, since it uses less digits than its factorization.

28688854937494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14344427468749.

The product of its digits is 26754416640, while the sum is 85.

The spelling of 28688854937494 in words is "twenty-eight trillion, six hundred eighty-eight billion, eight hundred fifty-four million, nine hundred thirty-seven thousand, four hundred ninety-four".