28701197 has 4 divisors (see below), whose sum is σ = 32801376. Its totient is φ = 24601020.

The previous prime is 28701187. The next prime is 28701221. The reversal of 28701197 is 79110782.

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 28701197 - 2²⁴ = 11923981 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 (28701157) 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, 2050079 + ... + 2050092.

It is an arithmetic number, because the mean of its divisors is an integer number (8200344).

Almost surely, 2^28701197 is an apocalyptic number.

It is an amenable number.

28701197 is a deficient number, since it is larger than the sum of its proper divisors (4100179).

28701197 is an equidigital number, since it uses as much as digits as its factorization.

28701197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100178.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 28701197 is about 5357.3498112406. The cubic root of 28701197 is about 306.1728450923.

The spelling of 28701197 in words is "twenty-eight million, seven hundred one thousand, one hundred ninety-seven".