28019747896 has 32 divisors (see below), whose sum is σ = 60181678080. Its totient is φ = 11980591200.

The previous prime is 28019747893. The next prime is 28019747909. The reversal of 28019747896 is 69874791082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28019747893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556320 + ... + 604591.

It is an arithmetic number, because the mean of its divisors is an integer number (1880677440).

Almost surely, 2^28019747896 is an apocalyptic number.

It is an amenable number.

28019747896 is an abundant number, since it is smaller than the sum of its proper divisors (32161930184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28019747896 is a wasteful number, since it uses less digits than its factorization.

28019747896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161355 (or 1161351 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 28019747896 in words is "twenty-eight billion, nineteen million, seven hundred forty-seven thousand, eight hundred ninety-six".