28339197 has 16 divisors (see below), whose sum is σ = 40080768. Its totient is φ = 17772480.

The previous prime is 28339189. The next prime is 28339211. The reversal of 28339197 is 79193382.

It is not a de Polignac number, because 28339197 - 2³ = 28339189 is a prime.

It is a super-2 number, since 2×28339197² = 1606220173209618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28339147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843 + ... + 7575.

It is an arithmetic number, because the mean of its divisors is an integer number (2505048).

Almost surely, 2^28339197 is an apocalyptic number.

It is an amenable number.

28339197 is a deficient number, since it is larger than the sum of its proper divisors (11741571).

28339197 is a wasteful number, since it uses less digits than its factorization.

28339197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820.

The product of its digits is 81648, while the sum is 42.

The square root of 28339197 is about 5323.4572413048. The cubic root of 28339197 is about 304.8801715071.

The spelling of 28339197 in words is "twenty-eight million, three hundred thirty-nine thousand, one hundred ninety-seven".