28316031 has 8 divisors (see below), whose sum is σ = 38209920. Its totient is φ = 18649752.

The previous prime is 28316027. The next prime is 28316053. The reversal of 28316031 is 13061382.

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

It is not a de Polignac number, because 28316031 - 2² = 28316027 is a prime.

It is a super-2 number, since 2×28316031² = 1603595223185922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28315992 and 28316010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28316011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56611 + ... + 57108.

It is an arithmetic number, because the mean of its divisors is an integer number (4776240).

Almost surely, 2^28316031 is an apocalyptic number.

28316031 is a deficient number, since it is larger than the sum of its proper divisors (9893889).

28316031 is a wasteful number, since it uses less digits than its factorization.

28316031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113805.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 28316031 is about 5321.2809548078. The cubic root of 28316031 is about 304.7970736522.

The spelling of 28316031 in words is "twenty-eight million, three hundred sixteen thousand, thirty-one".