28837691494 has 4 divisors (see below), whose sum is σ = 43256537244. Its totient is φ = 14418845746.

The previous prime is 28837691473. The next prime is 28837691497. The reversal of 28837691494 is 49419673882.

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

It is a super-2 number, since 2×28837691494² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28837691497) 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 as a sum of consecutive naturals, namely, 7209422872 + ... + 7209422875.

It is an arithmetic number, because the mean of its divisors is an integer number (10814134311).

Almost surely, 2^28837691494 is an apocalyptic number.

28837691494 is a deficient number, since it is larger than the sum of its proper divisors (14418845750).

28837691494 is a wasteful number, since it uses less digits than its factorization.

28837691494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14418845749.

The product of its digits is 20901888, while the sum is 61.

The spelling of 28837691494 in words is "twenty-eight billion, eight hundred thirty-seven million, six hundred ninety-one thousand, four hundred ninety-four".