28838245881 has 8 divisors (see below), whose sum is σ = 38456131680. Its totient is φ = 19222928672.

The previous prime is 28838245879. The next prime is 28838245913. The reversal of 28838245881 is 18854283882.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28838245881 - 2¹ = 28838245879 is a prime.

It is a super-2 number, since 2×28838245881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28838245781) 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, 615795 + ... + 660968.

It is an arithmetic number, because the mean of its divisors is an integer number (4807016460).

Almost surely, 2^28838245881 is an apocalyptic number.

It is an amenable number.

28838245881 is a deficient number, since it is larger than the sum of its proper divisors (9617885799).

28838245881 is a wasteful number, since it uses less digits than its factorization.

28838245881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284295.

The product of its digits is 7864320, while the sum is 57.

The spelling of 28838245881 in words is "twenty-eight billion, eight hundred thirty-eight million, two hundred forty-five thousand, eight hundred eighty-one".