31742906 has 16 divisors (see below), whose sum is σ = 51369864. Its totient is φ = 14624064.

The previous prime is 31742891. The next prime is 31742917. The reversal of 31742906 is 60924713.

It can be written as a sum of positive squares in 4 ways, for example, as 23280625 + 8462281 = 4825^2 + 2909^2 .

It is a super-2 number, since 2×31742906² = 2015224162649672, which contains 22 as substring.

It is a Curzon 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, 27860 + ... + 28976.

Almost surely, 2^31742906 is an apocalyptic number.

31742906 is a deficient number, since it is larger than the sum of its proper divisors (19626958).

31742906 is a wasteful number, since it uses less digits than its factorization.

31742906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 31742906 is about 5634.0843089184. The cubic root of 31742906 is about 316.6276913558.

The spelling of 31742906 in words is "thirty-one million, seven hundred forty-two thousand, nine hundred six".