31988093398 has 8 divisors (see below), whose sum is σ = 48181236840. Its totient is φ = 15927681120.

The previous prime is 31988093393. The next prime is 31988093399. The reversal of 31988093398 is 89339088913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31988093393) 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 in 3 ways as a sum of consecutive naturals, for example, 33182188 + ... + 33183151.

It is an arithmetic number, because the mean of its divisors is an integer number (6022654605).

Almost surely, 2^31988093398 is an apocalyptic number.

31988093398 is a deficient number, since it is larger than the sum of its proper divisors (16193143442).

31988093398 is a wasteful number, since it uses less digits than its factorization.

31988093398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66365582.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The spelling of 31988093398 in words is "thirty-one billion, nine hundred eighty-eight million, ninety-three thousand, three hundred ninety-eight".