28122364578 has 64 divisors (see below), whose sum is σ = 70515256320. Its totient is φ = 7263681600.

The previous prime is 28122364577. The next prime is 28122364649. The reversal of 28122364578 is 87546322182.

It is not an unprimeable number, because it can be changed into a prime (28122364577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87333 + ... + 252728.

It is an arithmetic number, because the mean of its divisors is an integer number (1101800880).

Almost surely, 2^28122364578 is an apocalyptic number.

28122364578 is an abundant number, since it is smaller than the sum of its proper divisors (42392891742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28122364578 is a wasteful number, since it uses less digits than its factorization.

28122364578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340263.

The product of its digits is 1290240, while the sum is 48.

The spelling of 28122364578 in words is "twenty-eight billion, one hundred twenty-two million, three hundred sixty-four thousand, five hundred seventy-eight".