28881538476 has 48 divisors (see below), whose sum is σ = 81547877376. Its totient is φ = 7766463744.

The previous prime is 28881538471. The next prime is 28881538481. The reversal of 28881538476 is 67483518882.

It is an interprime number because it is at equal distance from previous prime (28881538471) and next prime (28881538481).

It is a super-4 number, since 4×28881538476⁴ (a number of 43 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (28881538471) 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, 10111156 + ... + 10114011.

It is an arithmetic number, because the mean of its divisors is an integer number (1698914112).

Almost surely, 2^28881538476 is an apocalyptic number.

It is an amenable number.

28881538476 is an abundant number, since it is smaller than the sum of its proper divisors (52666338900).

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

28881538476 is a wasteful number, since it uses less digits than its factorization.

28881538476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20225198 (or 20225196 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 60.

The spelling of 28881538476 in words is "twenty-eight billion, eight hundred eighty-one million, five hundred thirty-eight thousand, four hundred seventy-six".