28127428 has 12 divisors (see below), whose sum is σ = 56254912. Its totient is φ = 12054600.

The previous prime is 28127417. The next prime is 28127441. The reversal of 28127428 is 82472182.

28127428 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28127393 and 28127402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502248 + ... + 502303.

Almost surely, 2^28127428 is an apocalyptic number.

28127428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28127428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28127428 is a wasteful number, since it uses less digits than its factorization.

28127428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004562 (or 1004560 counting only the distinct ones).

The product of its digits is 14336, while the sum is 34.

The square root of 28127428 is about 5303.5297679941. The cubic root of 28127428 is about 304.1188506892.

The spelling of 28127428 in words is "twenty-eight million, one hundred twenty-seven thousand, four hundred twenty-eight".