28879542681890 has 32 divisors (see below), whose sum is σ = 51999413400000. Its totient is φ = 11548209561408.

The previous prime is 28879542681889. The next prime is 28879542681893. The reversal of 28879542681890 is 9818624597882.

It is not an unprimeable number, because it can be changed into a prime (28879542681893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454771361 + ... + 454834859.

It is an arithmetic number, because the mean of its divisors is an integer number (1624981668750).

Almost surely, 2^{28879542681890} is an apocalyptic number.

28879542681890 is a deficient number, since it is larger than the sum of its proper divisors (23119870718110).

28879542681890 is a wasteful number, since it uses less digits than its factorization.

28879542681890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76994.

The product of its (nonzero) digits is 1114767360, while the sum is 77.

The spelling of 28879542681890 in words is "twenty-eight trillion, eight hundred seventy-nine billion, five hundred forty-two million, six hundred eighty-one thousand, eight hundred ninety".