28319441670 has 256 divisors, whose sum is σ = 90647424000. Its totient is φ = 6215325696.

The previous prime is 28319441641. The next prime is 28319441671. The reversal of 28319441670 is 7614491382.

28319441670 is a `hidden beast` number, since 2 + 83 + 1 + 94 + 416 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28319441671) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1121241 + ... + 1146219.

It is an arithmetic number, because the mean of its divisors is an integer number (354091500).

Almost surely, 2^28319441670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28319441670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45323712000).

28319441670 is an abundant number, since it is smaller than the sum of its proper divisors (62327982330).

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

28319441670 is a wasteful number, since it uses less digits than its factorization.

28319441670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25044 (or 25038 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28319441670 in words is "twenty-eight billion, three hundred nineteen million, four hundred forty-one thousand, six hundred seventy".