28695195648 has 416 divisors, whose sum is σ = 98386360320. Its totient is φ = 8095334400.

The previous prime is 28695195643. The next prime is 28695195649. The reversal of 28695195648 is 84659159682.

28695195648 is a `hidden beast` number, since 2 + 8 + 69 + 5 + 1 + 9 + 564 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (37324800) is a multiple of the sum of its prime divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28695195643) 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, 78188361 + ... + 78188727.

Almost surely, 2^28695195648 is an apocalyptic number.

28695195648 is a gapful number since it is divisible by the number (28) 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 28695195648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49193180160).

28695195648 is an abundant number, since it is smaller than the sum of its proper divisors (69691164672).

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

28695195648 is a wasteful number, since it uses less digits than its factorization.

28695195648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 480 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 63.

The spelling of 28695195648 in words is "twenty-eight billion, six hundred ninety-five million, one hundred ninety-five thousand, six hundred forty-eight".