28243892 has 6 divisors (see below), whose sum is σ = 49426818. Its totient is φ = 14121944.

The previous prime is 28243879. The next prime is 28243903. The reversal of 28243892 is 29834282.

It can be written as a sum of positive squares in only one way, i.e., 24542116 + 3701776 = 4954^2 + 1924^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3530483 + ... + 3530490.

It is an arithmetic number, because the mean of its divisors is an integer number (8237803).

Almost surely, 2^28243892 is an apocalyptic number.

It is an amenable number.

28243892 is a deficient number, since it is larger than the sum of its proper divisors (21182926).

28243892 is a wasteful number, since it uses less digits than its factorization.

28243892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7060977 (or 7060975 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 28243892 is about 5314.4982829991. The cubic root of 28243892 is about 304.5380159844.

The spelling of 28243892 in words is "twenty-eight million, two hundred forty-three thousand, eight hundred ninety-two".