28345470320860 has 288 divisors, whose sum is σ = 75715312946112. Its totient is φ = 8814341652480.

The previous prime is 28345470320851. The next prime is 28345470320861. The reversal of 28345470320860 is 6802307454382.

It is a super-2 number, since 2×28345470320860² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28345470320798 and 28345470320807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345470320861) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11845159824 + ... + 11845162216.

It is an arithmetic number, because the mean of its divisors is an integer number (262900392174).

Almost surely, 2^{28345470320860} is an apocalyptic number.

28345470320860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28345470320860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37857656473056).

28345470320860 is an abundant number, since it is smaller than the sum of its proper divisors (47369842625252).

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

28345470320860 is a wasteful number, since it uses less digits than its factorization.

28345470320860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 28345470320860 in words is "twenty-eight trillion, three hundred forty-five billion, four hundred seventy million, three hundred twenty thousand, eight hundred sixty".