120400306 has 16 divisors (see below), whose sum is σ = 194937624. Its totient is φ = 55442304.

The previous prime is 120400289. The next prime is 120400333. The reversal of 120400306 is 603004021.

It can be written as a sum of positive squares in 4 ways, for example, as 114597025 + 5803281 = 10705^2 + 2409^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 120400306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6816 + ... + 16948.

Almost surely, 2^120400306 is an apocalyptic number.

120400306 is a deficient number, since it is larger than the sum of its proper divisors (74537318).

120400306 is a wasteful number, since it uses less digits than its factorization.

120400306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10605.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 120400306 is about 10972.7073231723. The cubic root of 120400306 is about 493.7902725042.

Adding to 120400306 its reverse (603004021), we get a palindrome (723404327).

The spelling of 120400306 in words is "one hundred twenty million, four hundred thousand, three hundred six".