28478551044 has 48 divisors (see below), whose sum is σ = 66844770048. Its totient is φ = 9436577568.

The previous prime is 28478551039. The next prime is 28478551069. The reversal of 28478551044 is 44015587482.

It is a happy number.

It is a super-2 number, since 2×28478551044² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28478550984 and 28478551002.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1852839 + ... + 1868145.

It is an arithmetic number, because the mean of its divisors is an integer number (1392599376).

Almost surely, 2^28478551044 is an apocalyptic number.

It is an amenable number.

28478551044 is an abundant number, since it is smaller than the sum of its proper divisors (38366219004).

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

28478551044 is a wasteful number, since it uses less digits than its factorization.

28478551044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16224 (or 16222 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 48.

The spelling of 28478551044 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred fifty-one thousand, forty-four".