28080378 has 48 divisors (see below), whose sum is σ = 65298240. Its totient is φ = 8944056.

The previous prime is 28080361. The next prime is 28080397. The reversal of 28080378 is 87308082.

28080378 is a `hidden beast` number, since 280 + 8 + 0 + 378 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28075 + ... + 29057.

It is an arithmetic number, because the mean of its divisors is an integer number (1360380).

Almost surely, 2^28080378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28080378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32649120).

28080378 is an abundant number, since it is smaller than the sum of its proper divisors (37217862).

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

28080378 is a wasteful number, since it uses less digits than its factorization.

28080378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28080378 is about 5299.0921864033. The cubic root of 28080378 is about 303.9491850084.

The spelling of 28080378 in words is "twenty-eight million, eighty thousand, three hundred seventy-eight".