31430986 has 8 divisors (see below), whose sum is σ = 47419524. Its totient is φ = 15624480.

The previous prime is 31430957. The next prime is 31431013. The reversal of 31430986 is 68903413.

It can be written as a sum of positive squares in 2 ways, for example, as 23222761 + 8208225 = 4819^2 + 2865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45075 + ... + 45766.

Almost surely, 2^31430986 is an apocalyptic number.

31430986 is a deficient number, since it is larger than the sum of its proper divisors (15988538).

31430986 is a wasteful number, since it uses less digits than its factorization.

31430986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91016.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 31430986 is about 5606.3344530986. The cubic root of 31430986 is about 315.5871671936.

The spelling of 31430986 in words is "thirty-one million, four hundred thirty thousand, nine hundred eighty-six".