28761097 has 4 divisors (see below), whose sum is σ = 28823680. Its totient is φ = 28698516.

The previous prime is 28761071. The next prime is 28761101. The reversal of 28761097 is 79016782.

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 a de Polignac number, because none of the positive numbers 2^k-28761097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28765097) 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 3 ways as a sum of consecutive naturals, for example, 30597 + ... + 31522.

It is an arithmetic number, because the mean of its divisors is an integer number (7205920).

Almost surely, 2^28761097 is an apocalyptic number.

It is an amenable number.

28761097 is a deficient number, since it is larger than the sum of its proper divisors (62583).

28761097 is an equidigital number, since it uses as much as digits as its factorization.

28761097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62582.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 28761097 is about 5362.9373481330. The cubic root of 28761097 is about 306.3856934706.

The spelling of 28761097 in words is "twenty-eight million, seven hundred sixty-one thousand, ninety-seven".