28153105 has 8 divisors (see below), whose sum is σ = 35771112. Its totient is φ = 21197568.

The previous prime is 28153067. The next prime is 28153121. The reversal of 28153105 is 50135182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1979649 + 26173456 = 1407^2 + 5116^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28153105 - 2⁷ = 28152977 is a prime.

It is a super-2 number, since 2×28153105² = 1585194642282050, which contains 22 as substring.

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 28153105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165522 + ... + 165691.

It is an arithmetic number, because the mean of its divisors is an integer number (4471389).

Almost surely, 2^28153105 is an apocalyptic number.

It is an amenable number.

28153105 is a deficient number, since it is larger than the sum of its proper divisors (7618007).

28153105 is a wasteful number, since it uses less digits than its factorization.

28153105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331235.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 28153105 is about 5305.9499620709. The cubic root of 28153105 is about 304.2113640033.

Adding to 28153105 its reverse (50135182), we get a palindrome (78288287).

The spelling of 28153105 in words is "twenty-eight million, one hundred fifty-three thousand, one hundred five".