28755641388 has 12 divisors (see below), whose sum is σ = 67096496600. Its totient is φ = 9585213792.

The previous prime is 28755641381. The next prime is 28755641393. The reversal of 28755641388 is 88314655782.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28755641381) 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, 1198151713 + ... + 1198151736.

Almost surely, 2^28755641388 is an apocalyptic number.

It is an amenable number.

28755641388 is an abundant number, since it is smaller than the sum of its proper divisors (38340855212).

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

28755641388 is a wasteful number, since it uses less digits than its factorization.

28755641388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396303456 (or 2396303454 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 57.

The spelling of 28755641388 in words is "twenty-eight billion, seven hundred fifty-five million, six hundred forty-one thousand, three hundred eighty-eight".