28151982 has 32 divisors (see below), whose sum is σ = 64720800. Its totient is φ = 9059904.

The previous prime is 28151951. The next prime is 28152001. The reversal of 28151982 is 28915182.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 7423 + ... + 10554.

It is an arithmetic number, because the mean of its divisors is an integer number (2022525).

Almost surely, 2^28151982 is an apocalyptic number.

28151982 is an abundant number, since it is smaller than the sum of its proper divisors (36568818).

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

28151982 is a wasteful number, since it uses less digits than its factorization.

28151982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18017 (or 18011 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 28151982 is about 5305.8441364216. The cubic root of 28151982 is about 304.2073190510.

The spelling of 28151982 in words is "twenty-eight million, one hundred fifty-one thousand, nine hundred eighty-two".