28053027778 has 4 divisors (see below), whose sum is σ = 42079541670. Its totient is φ = 14026513888.

The previous prime is 28053027767. The next prime is 28053027809. The reversal of 28053027778 is 87772035082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14829637729 + 13223390049 = 121777^2 + 114993^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7013256943 + ... + 7013256946.

Almost surely, 2^28053027778 is an apocalyptic number.

28053027778 is a deficient number, since it is larger than the sum of its proper divisors (14026513892).

28053027778 is a wasteful number, since it uses less digits than its factorization.

28053027778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14026513891.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 28053027778 in words is "twenty-eight billion, fifty-three million, twenty-seven thousand, seven hundred seventy-eight".