120728786 has 4 divisors (see below), whose sum is σ = 181093182. Its totient is φ = 60364392.

The previous prime is 120728779. The next prime is 120728789. The reversal of 120728786 is 687827021.

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., 105370225 + 15358561 = 10265^2 + 3919^2 .

It is not an unprimeable number, because it can be changed into a prime (120728789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30182195 + ... + 30182198.

Almost surely, 2^120728786 is an apocalyptic number.

120728786 is a deficient number, since it is larger than the sum of its proper divisors (60364396).

120728786 is an equidigital number, since it uses as much as digits as its factorization.

120728786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60364395.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 120728786 is about 10987.6651750952. The cubic root of 120728786 is about 494.2389229289.

The spelling of 120728786 in words is "one hundred twenty million, seven hundred twenty-eight thousand, seven hundred eighty-six".