28631197 has 8 divisors (see below), whose sum is σ = 33777152. Its totient is φ = 23749200.

The previous prime is 28631191. The next prime is 28631201. The reversal of 28631197 is 79113682.

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

It is a cyclic number.

It is not a de Polignac number, because 28631197 - 2³ = 28631189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631191) 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, 65754 + ... + 66187.

It is an arithmetic number, because the mean of its divisors is an integer number (4222144).

Almost surely, 2^28631197 is an apocalyptic number.

It is an amenable number.

28631197 is a deficient number, since it is larger than the sum of its proper divisors (5145955).

28631197 is a wasteful number, since it uses less digits than its factorization.

28631197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131979.

The product of its digits is 18144, while the sum is 37.

The square root of 28631197 is about 5350.8127420047. The cubic root of 28631197 is about 305.9237318289.

The spelling of 28631197 in words is "twenty-eight million, six hundred thirty-one thousand, one hundred ninety-seven".