27428865509448 has 192 divisors, whose sum is σ = 86172033991680. Its totient is φ = 7812299404800.

The previous prime is 27428865509447. The next prime is 27428865509491. The reversal of 27428865509448 is 84490556882472.

It is a happy number.

27428865509448 is a `hidden beast` number, since 2 + 7 + 4 + 28 + 8 + 6 + 550 + 9 + 4 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (27428865509447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19882663 + ... + 21217398.

It is an arithmetic number, because the mean of its divisors is an integer number (448812677040).

Almost surely, 2^{27428865509448} is an apocalyptic number.

It is an amenable number.

27428865509448 is an abundant number, since it is smaller than the sum of its proper divisors (58743168482232).

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

27428865509448 is a wasteful number, since it uses less digits than its factorization.

27428865509448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41100140 (or 41100133 counting only the distinct ones).

The product of its (nonzero) digits is 1238630400, while the sum is 72.

The spelling of 27428865509448 in words is "twenty-seven trillion, four hundred twenty-eight billion, eight hundred sixty-five million, five hundred nine thousand, four hundred forty-eight".