28378482 has 32 divisors (see below), whose sum is σ = 63595584. Its totient is φ = 8366400.

The previous prime is 28378421. The next prime is 28378507. The reversal of 28378482 is 28487382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3369 + ... + 8252.

It is an arithmetic number, because the mean of its divisors is an integer number (1987362).

Almost surely, 2^28378482 is an apocalyptic number.

28378482 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28378482 is an abundant number, since it is smaller than the sum of its proper divisors (35217102).

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

28378482 is a wasteful number, since it uses less digits than its factorization.

28378482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11674.

The product of its digits is 172032, while the sum is 42.

The square root of 28378482 is about 5327.1457648538. The cubic root of 28378482 is about 305.0209857459.

Subtracting 28378482 from its reverse (28487382), we obtain a square (108900 = 330²).

The spelling of 28378482 in words is "twenty-eight million, three hundred seventy-eight thousand, four hundred eighty-two".