28198641 has 8 divisors (see below), whose sum is σ = 39577120. Its totient is φ = 17809632.

The previous prime is 28198633. The next prime is 28198649. The reversal of 28198641 is 14689182.

It is an interprime number because it is at equal distance from previous prime (28198633) and next prime (28198649).

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

It is not a de Polignac number, because 28198641 - 2³ = 28198633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28198641.

It is not an unprimeable number, because it can be changed into a prime (28198649) 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, 247300 + ... + 247413.

It is an arithmetic number, because the mean of its divisors is an integer number (4947140).

Almost surely, 2^28198641 is an apocalyptic number.

It is an amenable number.

28198641 is a deficient number, since it is larger than the sum of its proper divisors (11378479).

28198641 is a wasteful number, since it uses less digits than its factorization.

28198641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494735.

The product of its digits is 27648, while the sum is 39.

The square root of 28198641 is about 5310.2392601464. The cubic root of 28198641 is about 304.3752903482.

The spelling of 28198641 in words is "twenty-eight million, one hundred ninety-eight thousand, six hundred forty-one".