27750128 has 20 divisors (see below), whose sum is σ = 61446960. Its totient is φ = 11892864.

The previous prime is 27750113. The next prime is 27750139. The reversal of 27750128 is 82105772.

It is a junction number, because it is equal to n+sod(n) for n = 27750094 and 27750103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123773 + ... + 123996.

It is an arithmetic number, because the mean of its divisors is an integer number (3072348).

Almost surely, 2^27750128 is an apocalyptic number.

27750128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27750128 is an abundant number, since it is smaller than the sum of its proper divisors (33696832).

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

27750128 is a wasteful number, since it uses less digits than its factorization.

27750128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247784 (or 247778 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 27750128 is about 5267.8390256347. The cubic root of 27750128 is about 302.7529128181.

It can be divided in two parts, 277 and 50128, that added together give a palindrome (50405).

The spelling of 27750128 in words is "twenty-seven million, seven hundred fifty thousand, one hundred twenty-eight".