28789378 has 8 divisors (see below), whose sum is σ = 43363980. Its totient is φ = 14334720.

The previous prime is 28789361. The next prime is 28789379. The reversal of 28789378 is 87398782.

It can be written as a sum of positive squares in 2 ways, for example, as 28483569 + 305809 = 5337^2 + 553^2 .

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 (28789379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29383 + ... + 30346.

Almost surely, 2^28789378 is an apocalyptic number.

28789378 is a deficient number, since it is larger than the sum of its proper divisors (14574602).

28789378 is a wasteful number, since it uses less digits than its factorization.

28789378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59972.

The product of its digits is 1354752, while the sum is 52.

The square root of 28789378 is about 5365.5734083134. The cubic root of 28789378 is about 306.4860843477.

The spelling of 28789378 in words is "twenty-eight million, seven hundred eighty-nine thousand, three hundred seventy-eight".