28841797 has 4 divisors (see below), whose sum is σ = 28873516. Its totient is φ = 28810080.

The previous prime is 28841783. The next prime is 28841821. The reversal of 28841797 is 79714882.

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 3500641 + 25341156 = 1871^2 + 5034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28841797 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 (28841767) 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, 14454 + ... + 16327.

It is an arithmetic number, because the mean of its divisors is an integer number (7218379).

Almost surely, 2^28841797 is an apocalyptic number.

It is an amenable number.

28841797 is a deficient number, since it is larger than the sum of its proper divisors (31719).

28841797 is an equidigital number, since it uses as much as digits as its factorization.

28841797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31718.

The product of its digits is 225792, while the sum is 46.

The square root of 28841797 is about 5370.4559396759. The cubic root of 28841797 is about 306.6719857038.

The spelling of 28841797 in words is "twenty-eight million, eight hundred forty-one thousand, seven hundred ninety-seven".