28315498 has 4 divisors (see below), whose sum is σ = 42473250. Its totient is φ = 14157748.

The previous prime is 28315481. The next prime is 28315499. The reversal of 28315498 is 89451382.

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

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 8450649 = 4457^2 + 2907^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28315498.

It is not an unprimeable number, because it can be changed into a prime (28315499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7078873 + ... + 7078876.

Almost surely, 2^28315498 is an apocalyptic number.

28315498 is a deficient number, since it is larger than the sum of its proper divisors (14157752).

28315498 is a wasteful number, since it uses less digits than its factorization.

28315498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14157751.

The product of its digits is 69120, while the sum is 40.

The square root of 28315498 is about 5321.2308726459. The cubic root of 28315498 is about 304.7951612154.

The spelling of 28315498 in words is "twenty-eight million, three hundred fifteen thousand, four hundred ninety-eight".