31726990 has 8 divisors (see below), whose sum is σ = 57108600. Its totient is φ = 12690792.

The previous prime is 31726973. The next prime is 31726993. The reversal of 31726990 is 9962713.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31726993) 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, 1586340 + ... + 1586359.

It is an arithmetic number, because the mean of its divisors is an integer number (7138575).

Almost surely, 2^31726990 is an apocalyptic number.

31726990 is a deficient number, since it is larger than the sum of its proper divisors (25381610).

31726990 is a wasteful number, since it uses less digits than its factorization.

31726990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172706.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 31726990 is about 5632.6716573931. The cubic root of 31726990 is about 316.5747631116.

The spelling of 31726990 in words is "thirty-one million, seven hundred twenty-six thousand, nine hundred ninety".