28906332957 has 24 divisors (see below), whose sum is σ = 42008046080. Its totient is φ = 19153571040.

The previous prime is 28906332907. The next prime is 28906332989. The reversal of 28906332957 is 75923360982.

It is a happy number.

It is not a de Polignac number, because 28906332957 - 2⁸ = 28906332701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28906332907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3721644 + ... + 3729402.

Almost surely, 2^28906332957 is an apocalyptic number.

It is an amenable number.

28906332957 is a deficient number, since it is larger than the sum of its proper divisors (13101713123).

28906332957 is a wasteful number, since it uses less digits than its factorization.

28906332957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10233 (or 10230 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 28906332957 in words is "twenty-eight billion, nine hundred six million, three hundred thirty-two thousand, nine hundred fifty-seven".