28610797 has 4 divisors (see below), whose sum is σ = 28729756. Its totient is φ = 28491840.

The previous prime is 28610783. The next prime is 28610807. The reversal of 28610797 is 79701682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9696996 + 18913801 = 3114^2 + 4349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28610797 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 (28610707) 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, 59118 + ... + 59599.

It is an arithmetic number, because the mean of its divisors is an integer number (7182439).

Almost surely, 2^28610797 is an apocalyptic number.

It is an amenable number.

28610797 is a deficient number, since it is larger than the sum of its proper divisors (118959).

28610797 is a wasteful number, since it uses less digits than its factorization.

28610797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118958.

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

The square root of 28610797 is about 5348.9061498591. The cubic root of 28610797 is about 305.8510567100.

The spelling of 28610797 in words is "twenty-eight million, six hundred ten thousand, seven hundred ninety-seven".