28487207697 has 16 divisors (see below), whose sum is σ = 40965525888. Its totient is φ = 17504524800.

The previous prime is 28487207687. The next prime is 28487207839. The reversal of 28487207697 is 79670278482.

It is a de Polignac number, because none of the positive numbers 2^k-28487207697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28487207697.

It is not an unprimeable number, because it can be changed into a prime (28487207657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516429 + ... + 568922.

It is an arithmetic number, because the mean of its divisors is an integer number (2560345368).

Almost surely, 2^28487207697 is an apocalyptic number.

It is an amenable number.

28487207697 is a deficient number, since it is larger than the sum of its proper divisors (12478318191).

28487207697 is a wasteful number, since it uses less digits than its factorization.

28487207697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086040.

The product of its (nonzero) digits is 18966528, while the sum is 60.

The spelling of 28487207697 in words is "twenty-eight billion, four hundred eighty-seven million, two hundred seven thousand, six hundred ninety-seven".