31438957 has 8 divisors (see below), whose sum is σ = 34364160. Its totient is φ = 28524960.

The previous prime is 31438909. The next prime is 31438963. The reversal of 31438957 is 75983413.

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

It is a cyclic number.

It is not a de Polignac number, because 31438957 - 2⁷ = 31438829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31438997) 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 7 ways as a sum of consecutive naturals, for example, 3748 + ... + 8770.

It is an arithmetic number, because the mean of its divisors is an integer number (4295520).

Almost surely, 2^31438957 is an apocalyptic number.

It is an amenable number.

31438957 is a deficient number, since it is larger than the sum of its proper divisors (2925203).

31438957 is a wasteful number, since it uses less digits than its factorization.

31438957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5603.

The product of its digits is 90720, while the sum is 40.

The square root of 31438957 is about 5607.0453003342. The cubic root of 31438957 is about 315.6138429151.

It can be divided in two parts, 3143 and 8957, that added together give a square (12100 = 110²).

The spelling of 31438957 in words is "thirty-one million, four hundred thirty-eight thousand, nine hundred fifty-seven".