28318131628306 has 16 divisors (see below), whose sum is σ = 45751230958104. Its totient is φ = 13068033537024.

The previous prime is 28318131628261. The next prime is 28318131628307. The reversal of 28318131628306 is 60382613181382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7534152115281 + 20783979513025 = 2744841^2 + 4558945^2 .

It is not an unprimeable number, because it can be changed into a prime (28318131628307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77872125 + ... + 78234928.

Almost surely, 2^{28318131628306} is an apocalyptic number.

28318131628306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28318131628306 is a deficient number, since it is larger than the sum of its proper divisors (17433099329798).

28318131628306 is a wasteful number, since it uses less digits than its factorization.

28318131628306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156114045.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 28318131628306 in words is "twenty-eight trillion, three hundred eighteen billion, one hundred thirty-one million, six hundred twenty-eight thousand, three hundred six".