39991848 has 64 divisors (see below), whose sum is σ = 112371840. Its totient is φ = 11768064.

The previous prime is 39991843. The next prime is 39991879. The reversal of 39991848 is 84819993.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 39991848.

It is not an unprimeable number, because it can be changed into a prime (39991843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4390 + ... + 9962.

It is an arithmetic number, because the mean of its divisors is an integer number (1755810).

Almost surely, 2^39991848 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 39991848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56185920).

39991848 is an abundant number, since it is smaller than the sum of its proper divisors (72379992).

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

39991848 is a wasteful number, since it uses less digits than its factorization.

39991848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618 (or 5614 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 39991848 is about 6323.9108153104. The cubic root of 39991848 is about 341.9719548837.

The spelling of 39991848 in words is "thirty-nine million, nine hundred ninety-one thousand, eight hundred forty-eight".