28562397 has 8 divisors (see below), whose sum is σ = 40323456. Its totient is φ = 17921472.

The previous prime is 28562381. The next prime is 28562411. The reversal of 28562397 is 79326582.

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

It is not a de Polignac number, because 28562397 - 2⁴ = 28562381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28562357) 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, 279973 + ... + 280074.

It is an arithmetic number, because the mean of its divisors is an integer number (5040432).

Almost surely, 2^28562397 is an apocalyptic number.

It is an amenable number.

28562397 is a deficient number, since it is larger than the sum of its proper divisors (11761059).

28562397 is a wasteful number, since it uses less digits than its factorization.

28562397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560067.

The product of its digits is 181440, while the sum is 42.

The square root of 28562397 is about 5344.3799453257. The cubic root of 28562397 is about 305.6784931103.

It can be divided in two parts, 2856 and 2397, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 28562397 in words is "twenty-eight million, five hundred sixty-two thousand, three hundred ninety-seven".