31395946 has 8 divisors (see below), whose sum is σ = 47117700. Its totient is φ = 15690048.

The previous prime is 31395941. The next prime is 31395967. The reversal of 31395946 is 64959313.

It can be written as a sum of positive squares in 2 ways, for example, as 29278921 + 2117025 = 5411^2 + 1455^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31395899 and 31395908.

It is not an unprimeable number, because it can be changed into a prime (31395941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5730 + ... + 9778.

Almost surely, 2^31395946 is an apocalyptic number.

31395946 is a deficient number, since it is larger than the sum of its proper divisors (15721754).

31395946 is a wasteful number, since it uses less digits than its factorization.

31395946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928.

The product of its digits is 87480, while the sum is 40.

The square root of 31395946 is about 5603.2085451106. The cubic root of 31395946 is about 315.4698489290.

The spelling of 31395946 in words is "thirty-one million, three hundred ninety-five thousand, nine hundred forty-six".