28075378 has 8 divisors (see below), whose sum is σ = 43251372. Its totient is φ = 13658256.

The previous prime is 28075357. The next prime is 28075379. The reversal of 28075378 is 87357082.

It can be written as a sum of positive squares in 2 ways, for example, as 20638849 + 7436529 = 4543^2 + 2727^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28075378.

It is not an unprimeable number, because it can be changed into a prime (28075379) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 189625 + ... + 189772.

Almost surely, 2^28075378 is an apocalyptic number.

28075378 is a deficient number, since it is larger than the sum of its proper divisors (15175994).

28075378 is a wasteful number, since it uses less digits than its factorization.

28075378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379436.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28075378 is about 5298.6203864780. The cubic root of 28075378 is about 303.9311435117.

The spelling of 28075378 in words is "twenty-eight million, seventy-five thousand, three hundred seventy-eight".