31334728386 has 24 divisors (see below), whose sum is σ = 67861011600. Its totient is φ = 9641454576.

The previous prime is 31334728379. The next prime is 31334728493. The reversal of 31334728386 is 68382743313.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15450036 + ... + 15452063.

It is an arithmetic number, because the mean of its divisors is an integer number (2827542150).

Almost surely, 2^31334728386 is an apocalyptic number.

31334728386 is an abundant number, since it is smaller than the sum of its proper divisors (36526283214).

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

31334728386 is a wasteful number, since it uses less digits than its factorization.

31334728386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30902130 (or 30902117 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The spelling of 31334728386 in words is "thirty-one billion, three hundred thirty-four million, seven hundred twenty-eight thousand, three hundred eighty-six".