28976947848 has 48 divisors (see below), whose sum is σ = 83095662780. Its totient is φ = 9090806784.

The previous prime is 28976947847. The next prime is 28976947903. The reversal of 28976947848 is 84874967982.

28976947848 is a `hidden beast` number, since 2 + 8 + 97 + 69 + 478 + 4 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28250214084 + 726733764 = 168078^2 + 26958^2 .

It is a super-2 number, since 2×28976947848² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (28976947847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11835765 + ... + 11838212.

Almost surely, 2^28976947848 is an apocalyptic number.

It is an amenable number.

28976947848 is an abundant number, since it is smaller than the sum of its proper divisors (54118714932).

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

28976947848 is a wasteful number, since it uses less digits than its factorization.

28976947848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23674006 (or 23673999 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 72.

The spelling of 28976947848 in words is "twenty-eight billion, nine hundred seventy-six million, nine hundred forty-seven thousand, eight hundred forty-eight".