39131648 has 40 divisors (see below), whose sum is σ = 81610848. Its totient is φ = 18709504.

The previous prime is 39131647. The next prime is 39131663. The reversal of 39131648 is 84613193.

It is not an unprimeable number, because it can be changed into a prime (39131647) 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, 10115 + ... + 13437.

Almost surely, 2^39131648 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 39131648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40805424).

39131648 is an abundant number, since it is smaller than the sum of its proper divisors (42479200).

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

39131648 is an equidigital number, since it uses as much as digits as its factorization.

39131648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364 (or 3348 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 39131648 is about 6255.5293940641. The cubic root of 39131648 is about 339.5022937068.

The spelling of 39131648 in words is "thirty-nine million, one hundred thirty-one thousand, six hundred forty-eight".