28694727936 has 216 divisors, whose sum is σ = 96106459904. Its totient is φ = 8063815680.

The previous prime is 28694727913. The next prime is 28694727959. The reversal of 28694727936 is 63972749682.

28694727936 is a `hidden beast` number, since 2 + 8 + 69 + 472 + 79 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (28694727913) and next prime (28694727959).

It is a super-2 number, since 2×28694727936² (a number of 22 digits) contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 969225 + ... + 998391.

Almost surely, 2^28694727936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28694727936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48053229952).

28694727936 is an abundant number, since it is smaller than the sum of its proper divisors (67411731968).

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

28694727936 is a wasteful number, since it uses less digits than its factorization.

28694727936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29257 (or 29240 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 28694727936 in words is "twenty-eight billion, six hundred ninety-four million, seven hundred twenty-seven thousand, nine hundred thirty-six".