28915241697 has 6 divisors (see below), whose sum is σ = 41766460242. Its totient is φ = 19276827792.

The previous prime is 28915241689. The next prime is 28915241701. The reversal of 28915241697 is 79614251982.

It is a happy number.

28915241697 is a `hidden beast` number, since 2 + 8 + 91 + 52 + 416 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23004092241 + 5911149456 = 151671^2 + 76884^2 .

It is not a de Polignac number, because 28915241697 - 2³ = 28915241689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28915241647) 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, 1606402308 + ... + 1606402325.

It is an arithmetic number, because the mean of its divisors is an integer number (6961076707).

Almost surely, 2^28915241697 is an apocalyptic number.

It is an amenable number.

28915241697 is a deficient number, since it is larger than the sum of its proper divisors (12851218545).

28915241697 is a wasteful number, since it uses less digits than its factorization.

28915241697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212804639 (or 3212804636 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 28915241697 in words is "twenty-eight billion, nine hundred fifteen million, two hundred forty-one thousand, six hundred ninety-seven".