28196031 has 8 divisors (see below), whose sum is σ = 38110000. Its totient is φ = 18539712.

The previous prime is 28196027. The next prime is 28196087. The reversal of 28196031 is 13069182.

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

It is not a de Polignac number, because 28196031 - 2² = 28196027 is a prime.

It is a super-2 number, since 2×28196031² = 1590032328305922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28196031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64156 + ... + 64593.

It is an arithmetic number, because the mean of its divisors is an integer number (4763750).

Almost surely, 2^28196031 is an apocalyptic number.

28196031 is a deficient number, since it is larger than the sum of its proper divisors (9913969).

28196031 is a wasteful number, since it uses less digits than its factorization.

28196031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128825.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 28196031 is about 5309.9935028209. The cubic root of 28196031 is about 304.3658993044.

The spelling of 28196031 in words is "twenty-eight million, one hundred ninety-six thousand, thirty-one".