38439684 has 72 divisors (see below), whose sum is σ = 102368448. Its totient is φ = 12610080.

The previous prime is 38439671. The next prime is 38439701. The reversal of 38439684 is 48693483.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68734 + ... + 69290.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^38439684 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 38439684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51184224).

38439684 is an abundant number, since it is smaller than the sum of its proper divisors (63928764).

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

38439684 is a wasteful number, since it uses less digits than its factorization.

38439684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 633 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 38439684 is about 6199.9745160767. The cubic root of 38439684 is about 337.4892441017.

The spelling of 38439684 in words is "thirty-eight million, four hundred thirty-nine thousand, six hundred eighty-four".