28587325031 has 4 divisors (see below), whose sum is σ = 29014001592. Its totient is φ = 28160648472.

The previous prime is 28587325021. The next prime is 28587325057. The reversal of 28587325031 is 13052378582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28587325031 - 2¹⁸ = 28587062887 is a prime.

It is a super-2 number, since 2×28587325031² (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 (28587325021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213338180 + ... + 213338313.

It is an arithmetic number, because the mean of its divisors is an integer number (7253500398).

Almost surely, 2^28587325031 is an apocalyptic number.

28587325031 is a deficient number, since it is larger than the sum of its proper divisors (426676561).

28587325031 is an equidigital number, since it uses as much as digits as its factorization.

28587325031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426676560.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 28587325031 in words is "twenty-eight billion, five hundred eighty-seven million, three hundred twenty-five thousand, thirty-one".