28913056919 has 4 divisors (see below), whose sum is σ = 29025559344. Its totient is φ = 28800554496.

The previous prime is 28913056891. The next prime is 28913056961. The reversal of 28913056919 is 91965031982.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28913056919 is a prime.

It is a super-2 number, since 2×28913056919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28913056999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56250827 + ... + 56251340.

It is an arithmetic number, because the mean of its divisors is an integer number (7256389836).

Almost surely, 2^28913056919 is an apocalyptic number.

28913056919 is a deficient number, since it is larger than the sum of its proper divisors (112502425).

28913056919 is a wasteful number, since it uses less digits than its factorization.

28913056919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112502424.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 28913056919 in words is "twenty-eight billion, nine hundred thirteen million, fifty-six thousand, nine hundred nineteen".