28006156 has 12 divisors (see below), whose sum is σ = 49064400. Its totient is φ = 13987760.

The previous prime is 28006129. The next prime is 28006159. The reversal of 28006156 is 65160082.

It is not an unprimeable number, because it can be changed into a prime (28006159) by changing a digit.

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, 945 + ... + 7543.

It is an arithmetic number, because the mean of its divisors is an integer number (4088700).

Almost surely, 2^28006156 is an apocalyptic number.

It is an amenable number.

28006156 is a deficient number, since it is larger than the sum of its proper divisors (21058244).

28006156 is a wasteful number, since it uses less digits than its factorization.

28006156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7664 (or 7662 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 28006156 is about 5292.0842774846. The cubic root of 28006156 is about 303.6811494161.

The spelling of 28006156 in words is "twenty-eight million, six thousand, one hundred fifty-six".