28150505 has 8 divisors (see below), whose sum is σ = 35249472. Its totient is φ = 21541168.

The previous prime is 28150483. The next prime is 28150513. The reversal of 28150505 is 50505182.

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 28150505 - 2¹⁰ = 28149481 is a prime.

It is a Duffinian number.

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, 122279 + ... + 122508.

It is an arithmetic number, because the mean of its divisors is an integer number (4406184).

Almost surely, 2^28150505 is an apocalyptic number.

It is an amenable number.

28150505 is a deficient number, since it is larger than the sum of its proper divisors (7098967).

28150505 is a wasteful number, since it uses less digits than its factorization.

28150505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244815.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 28150505 is about 5305.7049484494. The cubic root of 28150505 is about 304.2019988564.

Adding to 28150505 its reverse (50505182), we get a palindrome (78655687).

The spelling of 28150505 in words is "twenty-eight million, one hundred fifty thousand, five hundred five".