39891852 has 288 divisors, whose sum is σ = 143829504. Its totient is φ = 9331200.

The previous prime is 39891851. The next prime is 39891853. The reversal of 39891852 is 25819893.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39891851) and next prime (39891853).

It is a junction number, because it is equal to n+sod(n) for n = 39891798 and 39891807.

It is not an unprimeable number, because it can be changed into a prime (39891851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 972952 + ... + 972992.

It is an arithmetic number, because the mean of its divisors is an integer number (499408).

Almost surely, 2^39891852 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 39891852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71914752).

39891852 is an abundant number, since it is smaller than the sum of its proper divisors (103937652).

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

39891852 is a wasteful number, since it uses less digits than its factorization.

39891852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 77 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 39891852 is about 6315.9996833439. Note that the first 3 decimals coincide. The cubic root of 39891852 is about 341.6866936770.

The spelling of 39891852 in words is "thirty-nine million, eight hundred ninety-one thousand, eight hundred fifty-two".