31628216862 has 72 divisors (see below), whose sum is σ = 76070259720. Its totient is φ = 9489348000.

The previous prime is 31628216857. The next prime is 31628216863. The reversal of 31628216862 is 26861282613.

31628216862 is a `hidden beast` number, since 3 + 1 + 628 + 2 + 16 + 8 + 6 + 2 = 666.

It is a super-2 number, since 2×31628216862² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31628216863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 148089 + ... + 291867.

It is an arithmetic number, because the mean of its divisors is an integer number (1056531385).

Almost surely, 2^31628216862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31628216862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38035129860).

31628216862 is an abundant number, since it is smaller than the sum of its proper divisors (44442042858).

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

31628216862 is a wasteful number, since it uses less digits than its factorization.

31628216862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143910 (or 143896 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 31628216862 in words is "thirty-one billion, six hundred twenty-eight million, two hundred sixteen thousand, eight hundred sixty-two".