28051315 has 8 divisors (see below), whose sum is σ = 35433360. Its totient is φ = 21259872.

The previous prime is 28051297. The next prime is 28051327. The reversal of 28051315 is 51315082.

It is a happy number.

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 28051315 - 2²¹ = 25954163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28051315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147544 + ... + 147733.

It is an arithmetic number, because the mean of its divisors is an integer number (4429170).

Almost surely, 2^28051315 is an apocalyptic number.

28051315 is a deficient number, since it is larger than the sum of its proper divisors (7382045).

28051315 is a wasteful number, since it uses less digits than its factorization.

28051315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295301.

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

The square root of 28051315 is about 5296.3492143173. The cubic root of 28051315 is about 303.8442870316.

Adding to 28051315 its reverse (51315082), we get a palindrome (79366397).

The spelling of 28051315 in words is "twenty-eight million, fifty-one thousand, three hundred fifteen".