28123102 has 8 divisors (see below), whose sum is σ = 48211056. Its totient is φ = 12052752.

The previous prime is 28123093. The next prime is 28123103. The reversal of 28123102 is 20132182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28123102² = 1581817732204808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28123102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28123103) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1004383 + ... + 1004410.

It is an arithmetic number, because the mean of its divisors is an integer number (6026382).

Almost surely, 2^28123102 is an apocalyptic number.

28123102 is a deficient number, since it is larger than the sum of its proper divisors (20087954).

28123102 is a wasteful number, since it uses less digits than its factorization.

28123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008802.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28123102 is about 5303.1219107239. The cubic root of 28123102 is about 304.1032587244.

Adding to 28123102 its reverse (20132182), we get a palindrome (48255284).

The spelling of 28123102 in words is "twenty-eight million, one hundred twenty-three thousand, one hundred two".