31348638 has 24 divisors (see below), whose sum is σ = 68321448. Its totient is φ = 10388112.

The previous prime is 31348637. The next prime is 31348643. The reversal of 31348638 is 83684313.

It is a happy number.

31348638 is a `hidden beast` number, since 3 + 13 + 4 + 8 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31348631) 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, 1920 + ... + 8147.

It is an arithmetic number, because the mean of its divisors is an integer number (2846727).

Almost surely, 2^31348638 is an apocalyptic number.

31348638 is an abundant number, since it is smaller than the sum of its proper divisors (36972810).

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

31348638 is a wasteful number, since it uses less digits than its factorization.

31348638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10248 (or 10245 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 31348638 is about 5598.9854438103. The cubic root of 31348638 is about 315.3113173154.

The spelling of 31348638 in words is "thirty-one million, three hundred forty-eight thousand, six hundred thirty-eight".