27888428 has 12 divisors (see below), whose sum is σ = 51373560. Its totient is φ = 13210272.

The previous prime is 27888391. The next prime is 27888431. The reversal of 27888428 is 82488872.

It is a happy number.

It is a super-2 number, since 2×27888428² = 1555528832622368, which contains 22 as substring.

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, 183401 + ... + 183552.

It is an arithmetic number, because the mean of its divisors is an integer number (4281130).

Almost surely, 2^27888428 is an apocalyptic number.

It is an amenable number.

27888428 is a deficient number, since it is larger than the sum of its proper divisors (23485132).

27888428 is a wasteful number, since it uses less digits than its factorization.

27888428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366976 (or 366974 counting only the distinct ones).

The product of its digits is 458752, while the sum is 47.

The square root of 27888428 is about 5280.9495358316. The cubic root of 27888428 is about 303.2550289632.

The spelling of 27888428 in words is "twenty-seven million, eight hundred eighty-eight thousand, four hundred twenty-eight".