28606833972 has 18 divisors (see below), whose sum is σ = 72311719298. Its totient is φ = 9535611312.

The previous prime is 28606833953. The next prime is 28606833973. The reversal of 28606833972 is 27933860682.

It is a happy number.

28606833972 is a `hidden beast` number, since 28 + 606 + 8 + 3 + 3 + 9 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20876204196 + 7730629776 = 144486^2 + 87924^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28606833973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 397317103 + ... + 397317174.

Almost surely, 2^28606833972 is an apocalyptic number.

It is an amenable number.

28606833972 is an abundant number, since it is smaller than the sum of its proper divisors (43704885326).

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

28606833972 is a wasteful number, since it uses less digits than its factorization.

28606833972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794634287 (or 794634282 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 28606833972 in words is "twenty-eight billion, six hundred six million, eight hundred thirty-three thousand, nine hundred seventy-two".