311228430138 has 40 divisors (see below), whose sum is σ = 738404713332. Its totient is φ = 97640290944.

The previous prime is 311228430137. The next prime is 311228430187. The reversal of 311228430138 is 831034822113.

311228430138 is a `hidden beast` number, since 31 + 12 + 284 + 301 + 38 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 283616958249 + 27611471889 = 532557^2 + 166167^2 .

It is not an unprimeable number, because it can be changed into a prime (311228430137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56502045 + ... + 56507552.

Almost surely, 2^311228430138 is an apocalyptic number.

311228430138 is an abundant number, since it is smaller than the sum of its proper divisors (427176283194).

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

311228430138 is a wasteful number, since it uses less digits than its factorization.

311228430138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113009628 (or 113009619 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 311228430138 in words is "three hundred eleven billion, two hundred twenty-eight million, four hundred thirty thousand, one hundred thirty-eight".