28889602497 has 24 divisors (see below), whose sum is σ = 47714861376. Its totient is φ = 16500005856.

The previous prime is 28889602463. The next prime is 28889602523. The reversal of 28889602497 is 79420698882.

28889602497 is a `hidden beast` number, since 2 + 8 + 8 + 89 + 60 + 2 + 497 = 666.

It is not a de Polignac number, because 28889602497 - 2⁷ = 28889602369 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (28889602897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10998 + ... + 240624.

It is an arithmetic number, because the mean of its divisors is an integer number (1988119224).

Almost surely, 2^28889602497 is an apocalyptic number.

It is an amenable number.

28889602497 is a deficient number, since it is larger than the sum of its proper divisors (18825258879).

28889602497 is a wasteful number, since it uses less digits than its factorization.

28889602497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231637 (or 231634 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 28889602497 in words is "twenty-eight billion, eight hundred eighty-nine million, six hundred two thousand, four hundred ninety-seven".