28388706 has 8 divisors (see below), whose sum is σ = 56777424. Its totient is φ = 9462900.

The previous prime is 28388681. The next prime is 28388713. The reversal of 28388706 is 60788382.

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

28388706 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365720 + ... + 2365731.

It is an arithmetic number, because the mean of its divisors is an integer number (7097178).

Almost surely, 2^28388706 is an apocalyptic number.

28388706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28388706 is a wasteful number, since it uses less digits than its factorization.

28388706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731456.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28388706 is about 5328.1052917524. The cubic root of 28388706 is about 305.0576116199.

The spelling of 28388706 in words is "twenty-eight million, three hundred eighty-eight thousand, seven hundred six".