28078489579396 has 27 divisors (see below), whose sum is σ = 49198207898007. Its totient is φ = 14021880248520.

The previous prime is 28078489579391. The next prime is 28078489579397. The reversal of 28078489579396 is 69397598487082.

It is a happy number.

The square root of 28078489579396 is 5298914.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28078489579391) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15335056201 + ... + 15335058031.

Almost surely, 2^{28078489579396} is an apocalyptic number.

28078489579396 is the 5298914-th square number.

It is an amenable number.

28078489579396 is a deficient number, since it is larger than the sum of its proper divisors (21119718318611).

28078489579396 is an frugal number, since it uses more digits than its factorization.

28078489579396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 13168189440, while the sum is 85.

The spelling of 28078489579396 in words is "twenty-eight trillion, seventy-eight billion, four hundred eighty-nine million, five hundred seventy-nine thousand, three hundred ninety-six".