28857402886 has 8 divisors (see below), whose sum is σ = 46615804704. Its totient is φ = 13318801320.

The previous prime is 28857402799. The next prime is 28857402887. The reversal of 28857402886 is 68820475882.

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

It is a super-2 number, since 2×28857402886² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28857402886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857402887) 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, 554950030 + ... + 554950081.

It is an arithmetic number, because the mean of its divisors is an integer number (5826975588).

Almost surely, 2^28857402886 is an apocalyptic number.

28857402886 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28857402886 is a deficient number, since it is larger than the sum of its proper divisors (17758401818).

28857402886 is a wasteful number, since it uses less digits than its factorization.

28857402886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109900126.

The product of its (nonzero) digits is 13762560, while the sum is 58.

The spelling of 28857402886 in words is "twenty-eight billion, eight hundred fifty-seven million, four hundred two thousand, eight hundred eighty-six".