28002725291 has 8 divisors (see below), whose sum is σ = 28278201600. Its totient is φ = 27727504168.

The previous prime is 28002725279. The next prime is 28002725389. The reversal of 28002725291 is 19252720082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28002725291 - 2¹⁸ = 28002463147 is a prime.

It is a super-2 number, since 2×28002725291² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28002725591) 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 7 ways as a sum of consecutive naturals, for example, 160610 + ... + 286008.

It is an arithmetic number, because the mean of its divisors is an integer number (3534775200).

Almost surely, 2^28002725291 is an apocalyptic number.

28002725291 is a deficient number, since it is larger than the sum of its proper divisors (275476309).

28002725291 is a wasteful number, since it uses less digits than its factorization.

28002725291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127593.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 28002725291 in words is "twenty-eight billion, two million, seven hundred twenty-five thousand, two hundred ninety-one".