28315718 has 4 divisors (see below), whose sum is σ = 42473580. Its totient is φ = 14157858.

The previous prime is 28315717. The next prime is 28315739. The reversal of 28315718 is 81751382.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7078928 + ... + 7078931.

It is an arithmetic number, because the mean of its divisors is an integer number (10618395).

Almost surely, 2^28315718 is an apocalyptic number.

28315718 is a deficient number, since it is larger than the sum of its proper divisors (14157862).

28315718 is a wasteful number, since it uses less digits than its factorization.

28315718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14157861.

The product of its digits is 13440, while the sum is 35.

The square root of 28315718 is about 5321.2515445147. The cubic root of 28315718 is about 304.7959505918.

The spelling of 28315718 in words is "twenty-eight million, three hundred fifteen thousand, seven hundred eighteen".