31380606 has 24 divisors (see below), whose sum is σ = 71991504. Its totient is φ = 9844800.

The previous prime is 31380563. The next prime is 31380607. The reversal of 31380606 is 60608313.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31380606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31380607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50970 + ... + 51581.

It is an arithmetic number, because the mean of its divisors is an integer number (2999646).

Almost surely, 2^31380606 is an apocalyptic number.

31380606 is an abundant number, since it is smaller than the sum of its proper divisors (40610898).

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

31380606 is a wasteful number, since it uses less digits than its factorization.

31380606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102576 (or 102573 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 31380606 is about 5601.8395193008. The cubic root of 31380606 is about 315.4184612344.

Adding to 31380606 its reverse (60608313), we get a palindrome (91988919).

The spelling of 31380606 in words is "thirty-one million, three hundred eighty thousand, six hundred six".