28478637760 has 56 divisors (see below), whose sum is σ = 67850400240. Its totient is φ = 11385467904.

The previous prime is 28478637713. The next prime is 28478637763. The reversal of 28478637760 is 6773687482.

It is a happy number.

It is a super-2 number, since 2×28478637760² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28478637695 and 28478637704.

It is not an unprimeable number, because it can be changed into a prime (28478637763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613446 + ... + 658234.

It is an arithmetic number, because the mean of its divisors is an integer number (1211614290).

Almost surely, 2^28478637760 is an apocalyptic number.

28478637760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28478637760 is an abundant number, since it is smaller than the sum of its proper divisors (39371762480).

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

28478637760 is a wasteful number, since it uses less digits than its factorization.

28478637760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46793 (or 46783 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 58.

The spelling of 28478637760 in words is "twenty-eight billion, four hundred seventy-eight million, six hundred thirty-seven thousand, seven hundred sixty".