31428166986 has 12 divisors (see below), whose sum is σ = 68094361842. Its totient is φ = 10476055656.

The previous prime is 31428166981. The next prime is 31428166993. The reversal of 31428166986 is 68966182413.

It can be written as a sum of positive squares in only one way, i.e., 17191143225 + 14237023761 = 131115^2 + 119319^2 .

It is not an unprimeable number, because it can be changed into a prime (31428166981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 873004621 + ... + 873004656.

Almost surely, 2^31428166986 is an apocalyptic number.

31428166986 is an abundant number, since it is smaller than the sum of its proper divisors (36666194856).

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

31428166986 is a wasteful number, since it uses less digits than its factorization.

31428166986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746009285 (or 1746009282 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 31428166986 in words is "thirty-one billion, four hundred twenty-eight million, one hundred sixty-six thousand, nine hundred eighty-six".