28890308877 has 8 divisors (see below), whose sum is σ = 38534909280. Its totient is φ = 19252957200.

The previous prime is 28890308833. The next prime is 28890308891. The reversal of 28890308877 is 77880309882.

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

It is not a de Polignac number, because 28890308877 - 2¹¹ = 28890306829 is a prime.

It is a super-2 number, since 2×28890308877² (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 28890308877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28890308897) 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, 1802874 + ... + 1818827.

It is an arithmetic number, because the mean of its divisors is an integer number (4816863660).

Almost surely, 2^28890308877 is an apocalyptic number.

It is an amenable number.

28890308877 is a deficient number, since it is larger than the sum of its proper divisors (9644600403).

28890308877 is a wasteful number, since it uses less digits than its factorization.

28890308877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624363.

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 28890308877 in words is "twenty-eight billion, eight hundred ninety million, three hundred eight thousand, eight hundred seventy-seven".