28253147077 has 4 divisors (see below), whose sum is σ = 29481544800. Its totient is φ = 27024749356.

The previous prime is 28253147057. The next prime is 28253147101. The reversal of 28253147077 is 77074135282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28253147077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253147047) 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, 614198827 + ... + 614198872.

It is an arithmetic number, because the mean of its divisors is an integer number (7370386200).

Almost surely, 2^28253147077 is an apocalyptic number.

It is an amenable number.

28253147077 is a deficient number, since it is larger than the sum of its proper divisors (1228397723).

28253147077 is a wasteful number, since it uses less digits than its factorization.

28253147077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228397722.

The product of its (nonzero) digits is 658560, while the sum is 46.

The spelling of 28253147077 in words is "twenty-eight billion, two hundred fifty-three million, one hundred forty-seven thousand, seventy-seven".