28361201257 has 8 divisors (see below), whose sum is σ = 29877190560. Its totient is φ = 26847541440.

The previous prime is 28361201251. The next prime is 28361201279. The reversal of 28361201257 is 75210216382.

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 28361201257 - 2³ = 28361201249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28361201251) 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, 557344 + ... + 606097.

It is an arithmetic number, because the mean of its divisors is an integer number (3734648820).

Almost surely, 2^28361201257 is an apocalyptic number.

It is an amenable number.

28361201257 is a deficient number, since it is larger than the sum of its proper divisors (1515989303).

28361201257 is a wasteful number, since it uses less digits than its factorization.

28361201257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164743.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 28361201257 in words is "twenty-eight billion, three hundred sixty-one million, two hundred one thousand, two hundred fifty-seven".