31728334746 has 32 divisors (see below), whose sum is σ = 63791981568. Its totient is φ = 10520351280.

The previous prime is 31728334741. The next prime is 31728334747. The reversal of 31728334746 is 64743382713.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31728334695 and 31728334704.

It is not an unprimeable number, because it can be changed into a prime (31728334741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030345 + ... + 1060691.

It is an arithmetic number, because the mean of its divisors is an integer number (1993499424).

Almost surely, 2^31728334746 is an apocalyptic number.

31728334746 is an abundant number, since it is smaller than the sum of its proper divisors (32063646822).

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

31728334746 is a wasteful number, since it uses less digits than its factorization.

31728334746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31266.

The product of its digits is 2032128, while the sum is 48.

The spelling of 31728334746 in words is "thirty-one billion, seven hundred twenty-eight million, three hundred thirty-four thousand, seven hundred forty-six".