28448378 has 32 divisors (see below), whose sum is σ = 53892864. Its totient is φ = 10973952.

The previous prime is 28448369. The next prime is 28448417. The reversal of 28448378 is 87384482.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 2876 + ... + 8072.

It is an arithmetic number, because the mean of its divisors is an integer number (1684152).

Almost surely, 2^28448378 is an apocalyptic number.

28448378 is a deficient number, since it is larger than the sum of its proper divisors (25444486).

28448378 is a wasteful number, since it uses less digits than its factorization.

28448378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246.

The product of its digits is 344064, while the sum is 44.

The square root of 28448378 is about 5333.7020914183. The cubic root of 28448378 is about 305.2712019398.

The spelling of 28448378 in words is "twenty-eight million, four hundred forty-eight thousand, three hundred seventy-eight".