28285742770 has 8 divisors (see below), whose sum is σ = 50914337004. Its totient is φ = 11314297104.

The previous prime is 28285742729. The next prime is 28285742773. The reversal of 28285742770 is 7724758282.

It can be written as a sum of positive squares in 2 ways, for example, as 25792038801 + 2493703969 = 160599^2 + 49937^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28285742773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414287129 + ... + 1414287148.

Almost surely, 2^28285742770 is an apocalyptic number.

28285742770 is a deficient number, since it is larger than the sum of its proper divisors (22628594234).

28285742770 is a wasteful number, since it uses less digits than its factorization.

28285742770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828574284.

The product of its (nonzero) digits is 3512320, while the sum is 52.

The spelling of 28285742770 in words is "twenty-eight billion, two hundred eighty-five million, seven hundred forty-two thousand, seven hundred seventy".