39801872 has 40 divisors (see below), whose sum is σ = 85574880. Its totient is φ = 17780480.

The previous prime is 39801871. The next prime is 39801907. The reversal of 39801872 is 27810893.

It is not an unprimeable number, because it can be changed into a prime (39801871) 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 7 ways as a sum of consecutive naturals, for example, 8468 + ... + 12300.

It is an arithmetic number, because the mean of its divisors is an integer number (2139372).

Almost surely, 2^39801872 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 39801872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42787440).

39801872 is an abundant number, since it is smaller than the sum of its proper divisors (45773008).

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

39801872 is a wasteful number, since it uses less digits than its factorization.

39801872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 39801872 is about 6308.8724824647. The cubic root of 39801872 is about 341.4295976180.

The spelling of 39801872 in words is "thirty-nine million, eight hundred one thousand, eight hundred seventy-two".