31438038 has 8 divisors (see below), whose sum is σ = 62876088. Its totient is φ = 10479344.

The previous prime is 31438037. The next prime is 31438073. The reversal of 31438038 is 83083413.

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

31438038 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 31437996 and 31438014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31438037) 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 3 ways as a sum of consecutive naturals, for example, 2619831 + ... + 2619842.

It is an arithmetic number, because the mean of its divisors is an integer number (7859511).

Almost surely, 2^31438038 is an apocalyptic number.

31438038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31438038 is a wasteful number, since it uses less digits than its factorization.

31438038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239678.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 31438038 is about 5606.9633492649. The cubic root of 31438038 is about 315.6107676228.

The spelling of 31438038 in words is "thirty-one million, four hundred thirty-eight thousand, thirty-eight".