28317490 has 8 divisors (see below), whose sum is σ = 50971500. Its totient is φ = 11326992.

The previous prime is 28317413. The next prime is 28317491. The reversal of 28317490 is 9471382.

It can be written as a sum of positive squares in 2 ways, for example, as 27217089 + 1100401 = 5217^2 + 1049^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28317491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415865 + ... + 1415884.

Almost surely, 2^28317490 is an apocalyptic number.

28317490 is a deficient number, since it is larger than the sum of its proper divisors (22654010).

28317490 is a wasteful number, since it uses less digits than its factorization.

28317490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831756.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28317490 is about 5321.4180440931. The cubic root of 28317490 is about 304.8023085112.

The spelling of 28317490 in words is "twenty-eight million, three hundred seventeen thousand, four hundred ninety".