200720578 has 4 divisors (see below), whose sum is σ = 301080870. Its totient is φ = 100360288.

The previous prime is 200720573. The next prime is 200720623. The reversal of 200720578 is 875027002.

200720578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 156325009 + 44395569 = 12503^2 + 6663^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (200720573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50180143 + ... + 50180146.

Almost surely, 2^200720578 is an apocalyptic number.

200720578 is a deficient number, since it is larger than the sum of its proper divisors (100360292).

200720578 is a wasteful number, since it uses less digits than its factorization.

200720578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100360291.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 200720578 is about 14167.5889974265. The cubic root of 200720578 is about 585.5050334750.

The spelling of 200720578 in words is "two hundred million, seven hundred twenty thousand, five hundred seventy-eight".