38931284 has 36 divisors (see below), whose sum is σ = 79634016. Its totient is φ = 16604784.

The previous prime is 38931281. The next prime is 38931287. The reversal of 38931284 is 48213983.

It is an interprime number because it is at equal distance from previous prime (38931281) and next prime (38931287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38931281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59849 + ... + 60495.

It is an arithmetic number, because the mean of its divisors is an integer number (2212056).

Almost surely, 2^38931284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38931284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39817008).

38931284 is an abundant number, since it is smaller than the sum of its proper divisors (40702732).

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

38931284 is a wasteful number, since it uses less digits than its factorization.

38931284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 963 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 38931284 is about 6239.4938897318. The cubic root of 38931284 is about 338.9218558551.

The spelling of 38931284 in words is "thirty-eight million, nine hundred thirty-one thousand, two hundred eighty-four".