28184903948 has 24 divisors (see below), whose sum is σ = 49930092912. Its totient is φ = 13919246784.

The previous prime is 28184903941. The next prime is 28184903951. The reversal of 28184903948 is 84930948182.

It is a junction number, because it is equal to n+sod(n) for n = 28184903893 and 28184903902.

It is not an unprimeable number, because it can be changed into a prime (28184903941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837286 + ... + 1852562.

It is an arithmetic number, because the mean of its divisors is an integer number (2080420538).

Almost surely, 2^28184903948 is an apocalyptic number.

It is an amenable number.

28184903948 is a deficient number, since it is larger than the sum of its proper divisors (21745188964).

28184903948 is a wasteful number, since it uses less digits than its factorization.

28184903948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20921 (or 20919 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 28184903948 in words is "twenty-eight billion, one hundred eighty-four million, nine hundred three thousand, nine hundred forty-eight".