27785030148 has 18 divisors (see below), whose sum is σ = 70234381854. Its totient is φ = 9261676704.

The previous prime is 27785030111. The next prime is 27785030149. The reversal of 27785030148 is 84103058772.

It can be written as a sum of positive squares in only one way, i.e., 27606487104 + 178543044 = 166152^2 + 13362^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (27785030149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 385903161 + ... + 385903232.

It is an arithmetic number, because the mean of its divisors is an integer number (3901910103).

Almost surely, 2^27785030148 is an apocalyptic number.

It is an amenable number.

27785030148 is an abundant number, since it is smaller than the sum of its proper divisors (42449351706).

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

27785030148 is a wasteful number, since it uses less digits than its factorization.

27785030148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771806403 (or 771806398 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 27785030148 in words is "twenty-seven billion, seven hundred eighty-five million, thirty thousand, one hundred forty-eight".