28318405950 has 168 divisors, whose sum is σ = 79305736608. Its totient is φ = 7519703040.

The previous prime is 28318405909. The next prime is 28318405963. The reversal of 28318405950 is 5950481382.

28318405950 is a `hidden beast` number, since 2 + 8 + 3 + 18 + 40 + 595 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 28318405896 and 28318405905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 9366139 + ... + 9369161.

It is an arithmetic number, because the mean of its divisors is an integer number (472057956).

Almost surely, 2^28318405950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28318405950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39652868304).

28318405950 is an abundant number, since it is smaller than the sum of its proper divisors (50987330658).

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

28318405950 is a wasteful number, since it uses less digits than its factorization.

28318405950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310 (or 3290 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 28318405950 in words is "twenty-eight billion, three hundred eighteen million, four hundred five thousand, nine hundred fifty".