42728197264 has 45 divisors (see below), whose sum is σ = 85593886131. Its totient is φ = 20662531680.

The previous prime is 42728197201. The next prime is 42728197279. The reversal of 42728197264 is 46279182724.

The square root of 42728197264 is 206708.

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

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25630959 + ... + 25632625.

Almost surely, 2^42728197264 is an apocalyptic number.

42728197264 is the 206708-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42728197264

42728197264 is an abundant number, since it is smaller than the sum of its proper divisors (42865688867).

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

42728197264 is an frugal number, since it uses more digits than its factorization.

42728197264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404 (or 1700 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The spelling of 42728197264 in words is "forty-two billion, seven hundred twenty-eight million, one hundred ninety-seven thousand, two hundred sixty-four".