2728378 has 8 divisors (see below), whose sum is σ = 4233780. Its totient is φ = 1317120.

The previous prime is 2728373. The next prime is 2728409. The reversal of 2728378 is 8738272.

2728378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2634129 + 94249 = 1623^2 + 307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2728373) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23463 + ... + 23578.

2^2728378 is an apocalyptic number.

2728378 is a deficient number, since it is larger than the sum of its proper divisors (1505402).

2728378 is a wasteful number, since it uses less digits than its factorization.

2728378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47072.

The product of its digits is 37632, while the sum is 37.

The square root of 2728378 is about 1651.7802517284. The cubic root of 2728378 is about 139.7338139414.

The spelling of 2728378 in words is "two million, seven hundred twenty-eight thousand, three hundred seventy-eight".