28071628 has 12 divisors (see below), whose sum is σ = 52904320. Its totient is φ = 12956112.

The previous prime is 28071613. The next prime is 28071653. The reversal of 28071628 is 82617082.

It is a junction number, because it is equal to n+sod(n) for n = 28071593 and 28071602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269868 + ... + 269971.

Almost surely, 2^28071628 is an apocalyptic number.

It is an amenable number.

28071628 is a deficient number, since it is larger than the sum of its proper divisors (24832692).

28071628 is a wasteful number, since it uses less digits than its factorization.

28071628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539856 (or 539854 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28071628 is about 5298.2665089631. The cubic root of 28071628 is about 303.9176109835.

The spelling of 28071628 in words is "twenty-eight million, seventy-one thousand, six hundred twenty-eight".