28285427578 has 8 divisors (see below), whose sum is σ = 42460707168. Its totient is φ = 14131858524.

The previous prime is 28285427567. The next prime is 28285427581. The reversal of 28285427578 is 87572458282.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5424376 + ... + 5429587.

It is an arithmetic number, because the mean of its divisors is an integer number (5307588396).

Almost surely, 2^28285427578 is an apocalyptic number.

28285427578 is a deficient number, since it is larger than the sum of its proper divisors (14175279590).

28285427578 is a wasteful number, since it uses less digits than its factorization.

28285427578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10855268.

The product of its digits is 20070400, while the sum is 58.

The spelling of 28285427578 in words is "twenty-eight billion, two hundred eighty-five million, four hundred twenty-seven thousand, five hundred seventy-eight".