28101118 has 4 divisors (see below), whose sum is σ = 42151680. Its totient is φ = 14050558.

The previous prime is 28101109. The next prime is 28101121. The reversal of 28101118 is 81110182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81110182 = 2 ⋅40555091.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7025278 + ... + 7025281.

It is an arithmetic number, because the mean of its divisors is an integer number (10537920).

Almost surely, 2^28101118 is an apocalyptic number.

28101118 is a deficient number, since it is larger than the sum of its proper divisors (14050562).

28101118 is a wasteful number, since it uses less digits than its factorization.

28101118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14050561.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 28101118 is about 5301.0487641598. The cubic root of 28101118 is about 304.0239982786.

The spelling of 28101118 in words is "twenty-eight million, one hundred one thousand, one hundred eighteen".