31356238028 has 6 divisors (see below), whose sum is σ = 54873416556. Its totient is φ = 15678119012.

The previous prime is 31356238027. The next prime is 31356238033. The reversal of 31356238028 is 82083265313.

It is not an unprimeable number, because it can be changed into a prime (31356238027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3919529750 + ... + 3919529757.

It is an arithmetic number, because the mean of its divisors is an integer number (9145569426).

Almost surely, 2^31356238028 is an apocalyptic number.

It is an amenable number.

31356238028 is a deficient number, since it is larger than the sum of its proper divisors (23517178528).

31356238028 is a wasteful number, since it uses less digits than its factorization.

31356238028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839059511 (or 7839059509 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 31356238028 in words is "thirty-one billion, three hundred fifty-six million, two hundred thirty-eight thousand, twenty-eight".