28774228047 has 16 divisors (see below), whose sum is σ = 38753447520. Its totient is φ = 18988992000.

The previous prime is 28774228031. The next prime is 28774228057. The reversal of 28774228047 is 74082247782.

It is a happy number.

It is not a de Polignac number, because 28774228047 - 2⁴ = 28774228031 is a prime.

It is a super-2 number, since 2×28774228047² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28774228057) 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, 2940579 + ... + 2950347.

It is an arithmetic number, because the mean of its divisors is an integer number (2422090470).

Almost surely, 2^28774228047 is an apocalyptic number.

28774228047 is a deficient number, since it is larger than the sum of its proper divisors (9979219473).

28774228047 is a wasteful number, since it uses less digits than its factorization.

28774228047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594.

The product of its (nonzero) digits is 2809856, while the sum is 51.

The spelling of 28774228047 in words is "twenty-eight billion, seven hundred seventy-four million, two hundred twenty-eight thousand, forty-seven".