28857623810 has 8 divisors (see below), whose sum is σ = 51943722876. Its totient is φ = 11543049520.

The previous prime is 28857623771. The next prime is 28857623827. The reversal of 28857623810 is 1832675882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28173958201 + 683665609 = 167851^2 + 26147^2 .

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

It is a super-2 number, since 2×28857623810² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442881181 + ... + 1442881200.

Almost surely, 2^28857623810 is an apocalyptic number.

28857623810 is a deficient number, since it is larger than the sum of its proper divisors (23086099066).

28857623810 is a wasteful number, since it uses less digits than its factorization.

28857623810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885762388.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 28857623810 in words is "twenty-eight billion, eight hundred fifty-seven million, six hundred twenty-three thousand, eight hundred ten".