28148515 has 8 divisors (see below), whose sum is σ = 35765280. Its totient is φ = 21194112.

The previous prime is 28148513. The next prime is 28148521. The reversal of 28148515 is 51584182.

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 28148515 - 2¹ = 28148513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28148513) 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, 165495 + ... + 165664.

It is an arithmetic number, because the mean of its divisors is an integer number (4470660).

Almost surely, 2^28148515 is an apocalyptic number.

28148515 is a deficient number, since it is larger than the sum of its proper divisors (7616765).

28148515 is a wasteful number, since it uses less digits than its factorization.

28148515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331181.

The product of its digits is 12800, while the sum is 34.

The square root of 28148515 is about 5305.5174111485. The cubic root of 28148515 is about 304.1948305274.

The spelling of 28148515 in words is "twenty-eight million, one hundred forty-eight thousand, five hundred fifteen".