28536497 has 4 divisors (see below), whose sum is σ = 31130736. Its totient is φ = 25942260.

The previous prime is 28536481. The next prime is 28536511. The reversal of 28536497 is 79463582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28536497 - 2⁴ = 28536481 is a prime.

It is a super-2 number, since 2×28536497² = 1628663322062018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28536407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297103 + ... + 1297124.

It is an arithmetic number, because the mean of its divisors is an integer number (7782684).

Almost surely, 2^28536497 is an apocalyptic number.

It is an amenable number.

28536497 is a deficient number, since it is larger than the sum of its proper divisors (2594239).

28536497 is a wasteful number, since it uses less digits than its factorization.

28536497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594238.

The product of its digits is 362880, while the sum is 44.

The square root of 28536497 is about 5341.9562896003. The cubic root of 28536497 is about 305.5860701108.

The spelling of 28536497 in words is "twenty-eight million, five hundred thirty-six thousand, four hundred ninety-seven".