28047876 has 24 divisors (see below), whose sum is σ = 68890080. Its totient is φ = 8857152.

The previous prime is 28047871. The next prime is 28047881. The reversal of 28047876 is 67874082.

It is an interprime number because it is at equal distance from previous prime (28047871) and next prime (28047881).

It is a super-2 number, since 2×28047876² = 1573366696222752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28047871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61281 + ... + 61736.

It is an arithmetic number, because the mean of its divisors is an integer number (2870420).

Almost surely, 2^28047876 is an apocalyptic number.

28047876 is the 3350-th centered pentagonal number.

It is an amenable number.

28047876 is an abundant number, since it is smaller than the sum of its proper divisors (40842204).

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

28047876 is a wasteful number, since it uses less digits than its factorization.

28047876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123043 (or 123041 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 28047876 is about 5296.0245467709. The cubic root of 28047876 is about 303.8318697503.

The spelling of 28047876 in words is "twenty-eight million, forty-seven thousand, eight hundred seventy-six".