28987102 has 4 divisors (see below), whose sum is σ = 43480656. Its totient is φ = 14493550.

The previous prime is 28987097. The next prime is 28987111. The reversal of 28987102 is 20178982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20178982 = 2 ⋅10089491.

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, 7246774 + ... + 7246777.

It is an arithmetic number, because the mean of its divisors is an integer number (10870164).

Almost surely, 2^28987102 is an apocalyptic number.

28987102 is a deficient number, since it is larger than the sum of its proper divisors (14493554).

28987102 is a wasteful number, since it uses less digits than its factorization.

28987102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14493553.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 28987102 is about 5383.9671247139. The cubic root of 28987102 is about 307.1861278345.

It can be divided in two parts, 2898 and 7102, that added together give a 4-th power (10000 = 10⁴).

The spelling of 28987102 in words is "twenty-eight million, nine hundred eighty-seven thousand, one hundred two".