28378378 has 16 divisors (see below), whose sum is σ = 48962304. Its totient is φ = 12083760.

The previous prime is 28378331. The next prime is 28378393. The reversal of 28378378 is 87387382.

28378378 is a modest number, since divided by 378378 gives 28 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4258 + ... + 8653.

It is an arithmetic number, because the mean of its divisors is an integer number (3060144).

Almost surely, 2^28378378 is an apocalyptic number.

28378378 is a deficient number, since it is larger than the sum of its proper divisors (20583926).

28378378 is a wasteful number, since it uses less digits than its factorization.

28378378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13077.

The product of its digits is 451584, while the sum is 46.

The square root of 28378378 is about 5327.1360035201. The cubic root of 28378378 is about 305.0206131370.

The spelling of 28378378 in words is "twenty-eight million, three hundred seventy-eight thousand, three hundred seventy-eight".