31342738 has 8 divisors (see below), whose sum is σ = 53730432. Its totient is φ = 13432596.

The previous prime is 31342733. The next prime is 31342739. The reversal of 31342738 is 83724313.

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

It is not an unprimeable number, because it can be changed into a prime (31342733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1119370 + ... + 1119397.

It is an arithmetic number, because the mean of its divisors is an integer number (6716304).

Almost surely, 2^31342738 is an apocalyptic number.

31342738 is a deficient number, since it is larger than the sum of its proper divisors (22387694).

31342738 is a wasteful number, since it uses less digits than its factorization.

31342738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238776.

The product of its digits is 12096, while the sum is 31.

The square root of 31342738 is about 5598.4585378477. The cubic root of 31342738 is about 315.2915349196.

The spelling of 31342738 in words is "thirty-one million, three hundred forty-two thousand, seven hundred thirty-eight".