28156948 has 12 divisors (see below), whose sum is σ = 50323392. Its totient is φ = 13778840.

The previous prime is 28156937. The next prime is 28156957. The reversal of 28156948 is 84965182.

It is a happy number.

It is a congruent number.

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, 74698 + ... + 75073.

It is an arithmetic number, because the mean of its divisors is an integer number (4193616).

Almost surely, 2^28156948 is an apocalyptic number.

It is an amenable number.

28156948 is a deficient number, since it is larger than the sum of its proper divisors (22166444).

28156948 is a wasteful number, since it uses less digits than its factorization.

28156948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149822 (or 149820 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 28156948 is about 5306.3120903317. The cubic root of 28156948 is about 304.2252053550.

The spelling of 28156948 in words is "twenty-eight million, one hundred fifty-six thousand, nine hundred forty-eight".