39121984 has 56 divisors (see below), whose sum is σ = 86173056. Its totient is φ = 17472000.

The previous prime is 39121963. The next prime is 39122023. The reversal of 39121984 is 48912193.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42489 + ... + 43399.

Almost surely, 2^39121984 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 39121984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43086528).

39121984 is an abundant number, since it is smaller than the sum of its proper divisors (47051072).

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

39121984 is a wasteful number, since it uses less digits than its factorization.

39121984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 985 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 39121984 is about 6254.7569097448. The cubic root of 39121984 is about 339.4743434375.

Adding to 39121984 its product of digits (15552), we get a square (39137536 = 6256²).

The spelling of 39121984 in words is "thirty-nine million, one hundred twenty-one thousand, nine hundred eighty-four".