28135040251 has 8 divisors (see below), whose sum is σ = 28614582000. Its totient is φ = 27655587840.

The previous prime is 28135040203. The next prime is 28135040281. The reversal of 28135040251 is 15204053182.

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 28135040251 - 2¹⁹ = 28134515963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28135040201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034475 + ... + 1061323.

It is an arithmetic number, because the mean of its divisors is an integer number (3576822750).

Almost surely, 2^28135040251 is an apocalyptic number.

28135040251 is a deficient number, since it is larger than the sum of its proper divisors (479541749).

28135040251 is a wasteful number, since it uses less digits than its factorization.

28135040251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44669.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 28135040251 in words is "twenty-eight billion, one hundred thirty-five million, forty thousand, two hundred fifty-one".