28100038 has 8 divisors (see below), whose sum is σ = 42195888. Its totient is φ = 14034744.

The previous prime is 28100011. The next prime is 28100041. The reversal of 28100038 is 83000182.

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

It is a super-2 number, since 2×28100038² = 1579224271202888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28099991 and 28100018.

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 3 ways as a sum of consecutive naturals, for example, 5181 + ... + 9112.

It is an arithmetic number, because the mean of its divisors is an integer number (5274486).

Almost surely, 2^28100038 is an apocalyptic number.

28100038 is a deficient number, since it is larger than the sum of its proper divisors (14095850).

28100038 is a wasteful number, since it uses less digits than its factorization.

28100038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15278.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 28100038 is about 5300.9468965459. The cubic root of 28100038 is about 304.0201034143.

The spelling of 28100038 in words is "twenty-eight million, one hundred thousand, thirty-eight".