28287163742 has 4 divisors (see below), whose sum is σ = 42430745616. Its totient is φ = 14143581870.

The previous prime is 28287163733. The next prime is 28287163757. The reversal of 28287163742 is 24736178282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24736178282 = 2 ⋅12368089141.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071790934 + ... + 7071790937.

It is an arithmetic number, because the mean of its divisors is an integer number (10607686404).

Almost surely, 2^28287163742 is an apocalyptic number.

28287163742 is a deficient number, since it is larger than the sum of its proper divisors (14143581874).

28287163742 is a wasteful number, since it uses less digits than its factorization.

28287163742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14143581873.

The product of its digits is 1806336, while the sum is 50.

The spelling of 28287163742 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred sixty-three thousand, seven hundred forty-two".