28913040508 has 36 divisors (see below), whose sum is σ = 55879565896. Its totient is φ = 13079959200.

The previous prime is 28913040503. The next prime is 28913040511. The reversal of 28913040508 is 80504031982.

It is a super-2 number, since 2×28913040508² (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 (28913040503) 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 in 11 ways as a sum of consecutive naturals, for example, 39435 + ... + 243682.

Almost surely, 2^28913040508 is an apocalyptic number.

It is an amenable number.

28913040508 is a deficient number, since it is larger than the sum of its proper divisors (26966525388).

28913040508 is a wasteful number, since it uses less digits than its factorization.

28913040508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283354 (or 283341 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 28913040508 in words is "twenty-eight billion, nine hundred thirteen million, forty thousand, five hundred eight".