31234638 has 8 divisors (see below), whose sum is σ = 62469288. Its totient is φ = 10411544.

The previous prime is 31234633. The next prime is 31234657. The reversal of 31234638 is 83643213.

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

31234638 is an admirable number.

It is a super-2 number, since 2×31234638² = 1951205221982088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2602881 + ... + 2602892.

It is an arithmetic number, because the mean of its divisors is an integer number (7808661).

Almost surely, 2^31234638 is an apocalyptic number.

31234638 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.

31234638 is a wasteful number, since it uses less digits than its factorization.

31234638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205778.

The product of its digits is 10368, while the sum is 30.

The square root of 31234638 is about 5588.7957557957. The cubic root of 31234638 is about 314.9286409282.

The spelling of 31234638 in words is "thirty-one million, two hundred thirty-four thousand, six hundred thirty-eight".