28851378 has 16 divisors (see below), whose sum is σ = 58125600. Its totient is φ = 9546656.

The previous prime is 28851371. The next prime is 28851391. The reversal of 28851378 is 87315882.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28851371) 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 7 ways as a sum of consecutive naturals, for example, 16728 + ... + 18371.

It is an arithmetic number, because the mean of its divisors is an integer number (3632850).

Almost surely, 2^28851378 is an apocalyptic number.

28851378 is an abundant number, since it is smaller than the sum of its proper divisors (29274222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28851378 is a wasteful number, since it uses less digits than its factorization.

28851378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35241.

The product of its digits is 107520, while the sum is 42.

The square root of 28851378 is about 5371.3478755337. The cubic root of 28851378 is about 306.7059398873.

The spelling of 28851378 in words is "twenty-eight million, eight hundred fifty-one thousand, three hundred seventy-eight".