28940967936 has 168 divisors, whose sum is σ = 84122445420. Its totient is φ = 9586999296.

The previous prime is 28940967931. The next prime is 28940967953. The reversal of 28940967936 is 63976904982.

28940967936 is a `hidden beast` number, since 2 + 89 + 409 + 67 + 93 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28872806400 + 68161536 = 169920^2 + 8256^2 .

It is not an unprimeable number, because it can be changed into a prime (28940967931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12753810 + ... + 12756078.

Almost surely, 2^28940967936 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 28940967936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42061222710).

28940967936 is an abundant number, since it is smaller than the sum of its proper divisors (55181477484).

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

28940967936 is a wasteful number, since it uses less digits than its factorization.

28940967936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 28940967936 in words is "twenty-eight billion, nine hundred forty million, nine hundred sixty-seven thousand, nine hundred thirty-six".