28357846631 has 4 divisors (see below), whose sum is σ = 28358583264. Its totient is φ = 28357110000.

The previous prime is 28357846571. The next prime is 28357846663. The reversal of 28357846631 is 13664875382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13664875382 = 2 ⋅6832437691.

It is a cyclic number.

It is not a de Polignac number, because 28357846631 - 2⁶ = 28357846567 is a prime.

It is a super-2 number, since 2×28357846631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357846691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307190 + ... + 388691.

It is an arithmetic number, because the mean of its divisors is an integer number (7089645816).

Almost surely, 2^28357846631 is an apocalyptic number.

28357846631 is a deficient number, since it is larger than the sum of its proper divisors (736633).

28357846631 is an equidigital number, since it uses as much as digits as its factorization.

28357846631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736632.

The product of its digits is 5806080, while the sum is 53.

The spelling of 28357846631 in words is "twenty-eight billion, three hundred fifty-seven million, eight hundred forty-six thousand, six hundred thirty-one".