28297924551 has 12 divisors (see below), whose sum is σ = 44018993928. Its totient is φ = 17414107344.

The previous prime is 28297924541. The next prime is 28297924553. The reversal of 28297924551 is 15542979282.

28297924551 is a `hidden beast` number, since 2 + 82 + 9 + 7 + 9 + 2 + 4 + 551 = 666.

It is not a de Polignac number, because 28297924551 - 2⁵ = 28297924519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297924553) 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, 120931185 + ... + 120931418.

It is an arithmetic number, because the mean of its divisors is an integer number (3668249494).

Almost surely, 2^28297924551 is an apocalyptic number.

28297924551 is a deficient number, since it is larger than the sum of its proper divisors (15721069377).

28297924551 is a wasteful number, since it uses less digits than its factorization.

28297924551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241862622 (or 241862619 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 28297924551 in words is "twenty-eight billion, two hundred ninety-seven million, nine hundred twenty-four thousand, five hundred fifty-one".