28197419 has 4 divisors (see below), whose sum is σ = 28618344. Its totient is φ = 27776496.

The previous prime is 28197397. The next prime is 28197439. The reversal of 28197419 is 91479182.

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

It is a cyclic number.

It is not a de Polignac number, because 28197419 - 2²⁴ = 11420203 is a prime.

It is a super-3 number, since 3×28197419³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28197439) 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, 210362 + ... + 210495.

It is an arithmetic number, because the mean of its divisors is an integer number (7154586).

Almost surely, 2^28197419 is an apocalyptic number.

28197419 is a deficient number, since it is larger than the sum of its proper divisors (420925).

28197419 is an equidigital number, since it uses as much as digits as its factorization.

28197419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420924.

The product of its digits is 36288, while the sum is 41.

The square root of 28197419 is about 5310.1241981709. The cubic root of 28197419 is about 304.3708935409.

The spelling of 28197419 in words is "twenty-eight million, one hundred ninety-seven thousand, four hundred nineteen".