31728796212 has 24 divisors (see below), whose sum is σ = 75048022336. Its totient is φ = 10431384768.

The previous prime is 31728796153. The next prime is 31728796223. The reversal of 31728796212 is 21269782713.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18109168 + ... + 18110919.

Almost surely, 2^31728796212 is an apocalyptic number.

It is an amenable number.

31728796212 is an abundant number, since it is smaller than the sum of its proper divisors (43319226124).

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

31728796212 is a wasteful number, since it uses less digits than its factorization.

31728796212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36220167 (or 36220165 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The spelling of 31728796212 in words is "thirty-one billion, seven hundred twenty-eight million, seven hundred ninety-six thousand, two hundred twelve".