31740726 has 8 divisors (see below), whose sum is σ = 63481464. Its totient is φ = 10580240.

The previous prime is 31740719. The next prime is 31740727. The reversal of 31740726 is 62704713.

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

31740726 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 31740693 and 31740702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31740727) 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, 2645055 + ... + 2645066.

It is an arithmetic number, because the mean of its divisors is an integer number (7935183).

Almost surely, 2^31740726 is an apocalyptic number.

31740726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31740726 is a wasteful number, since it uses less digits than its factorization.

31740726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290126.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 31740726 is about 5633.8908402631. The cubic root of 31740726 is about 316.6204428683.

The spelling of 31740726 in words is "thirty-one million, seven hundred forty thousand, seven hundred twenty-six".