28198455 has 8 divisors (see below), whose sum is σ = 45117552. Its totient is φ = 15039168.

The previous prime is 28198453. The next prime is 28198487. The reversal of 28198455 is 55489182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28198455 - 2¹ = 28198453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939934 + ... + 939963.

It is an arithmetic number, because the mean of its divisors is an integer number (5639694).

Almost surely, 2^28198455 is an apocalyptic number.

28198455 is a deficient number, since it is larger than the sum of its proper divisors (16919097).

28198455 is a wasteful number, since it uses less digits than its factorization.

28198455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879905.

The product of its digits is 115200, while the sum is 42.

The square root of 28198455 is about 5310.2217467823. The cubic root of 28198455 is about 304.3746211206.

The spelling of 28198455 in words is "twenty-eight million, one hundred ninety-eight thousand, four hundred fifty-five".