28308124446 has 64 divisors (see below), whose sum is σ = 65478896640. Its totient is φ = 7991343360.

The previous prime is 28308124441. The next prime is 28308124451. The reversal of 28308124446 is 64442180382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28308124441) and next prime (28308124451).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28308124398 and 28308124407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28308124441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9893056 + ... + 9895916.

It is an arithmetic number, because the mean of its divisors is an integer number (1023107760).

Almost surely, 2^28308124446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28308124446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32739448320).

28308124446 is an abundant number, since it is smaller than the sum of its proper divisors (37170772194).

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

28308124446 is a wasteful number, since it uses less digits than its factorization.

28308124446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609.

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 28308124446 in words is "twenty-eight billion, three hundred eight million, one hundred twenty-four thousand, four hundred forty-six".