28914145 has 8 divisors (see below), whose sum is σ = 37366056. Its totient is φ = 21351936.

The previous prime is 28914139. The next prime is 28914157. The reversal of 28914145 is 54141982.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12769 + 28901376 = 113^2 + 5376^2 .

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 28914145 - 2⁵ = 28914113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28914145.

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, 222352 + ... + 222481.

It is an arithmetic number, because the mean of its divisors is an integer number (4670757).

Almost surely, 2^28914145 is an apocalyptic number.

It is an amenable number.

28914145 is a deficient number, since it is larger than the sum of its proper divisors (8451911).

28914145 is a wasteful number, since it uses less digits than its factorization.

28914145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444851.

The product of its digits is 11520, while the sum is 34.

The square root of 28914145 is about 5377.1874618615. The cubic root of 28914145 is about 306.9281946464.

The spelling of 28914145 in words is "twenty-eight million, nine hundred fourteen thousand, one hundred forty-five".