28691141838 has 32 divisors (see below), whose sum is σ = 57909987072. Its totient is φ = 9476160000.

The previous prime is 28691141837. The next prime is 28691141839. The reversal of 28691141838 is 83814119682.

It is an interprime number because it is at equal distance from previous prime (28691141837) and next prime (28691141839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28691141837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241303 + ... + 340013.

It is an arithmetic number, because the mean of its divisors is an integer number (1809687096).

Almost surely, 2^28691141838 is an apocalyptic number.

28691141838 is an abundant number, since it is smaller than the sum of its proper divisors (29218845234).

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

28691141838 is a wasteful number, since it uses less digits than its factorization.

28691141838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99160.

The product of its digits is 663552, while the sum is 51.

The spelling of 28691141838 in words is "twenty-eight billion, six hundred ninety-one million, one hundred forty-one thousand, eight hundred thirty-eight".