28873797 has 4 divisors (see below), whose sum is σ = 38498400. Its totient is φ = 19249196.

The previous prime is 28873777. The next prime is 28873811. The reversal of 28873797 is 79737882.

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 28873797 - 2⁸ = 28873541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28873777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812297 + ... + 4812302.

It is an arithmetic number, because the mean of its divisors is an integer number (9624600).

Almost surely, 2^28873797 is an apocalyptic number.

It is an amenable number.

28873797 is a deficient number, since it is larger than the sum of its proper divisors (9624603).

28873797 is an equidigital number, since it uses as much as digits as its factorization.

28873797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624602.

The product of its digits is 1185408, while the sum is 51.

The square root of 28873797 is about 5373.4343766347. The cubic root of 28873797 is about 306.7853613997.

The spelling of 28873797 in words is "twenty-eight million, eight hundred seventy-three thousand, seven hundred ninety-seven".