39404436 has 48 divisors (see below), whose sum is σ = 97796160. Its totient is φ = 12305920.

The previous prime is 39404381. The next prime is 39404437. The reversal of 39404436 is 63440493.

It is a junction number, because it is equal to n+sod(n) for n = 39404397 and 39404406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39404437) 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 15 ways as a sum of consecutive naturals, for example, 85246 + ... + 85706.

It is an arithmetic number, because the mean of its divisors is an integer number (2037420).

Almost surely, 2^39404436 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 39404436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48898080).

39404436 is an abundant number, since it is smaller than the sum of its proper divisors (58391724).

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

39404436 is a wasteful number, since it uses less digits than its factorization.

39404436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 39404436 is about 6277.2952774264. The cubic root of 39404436 is about 340.2893615083.

The spelling of 39404436 in words is "thirty-nine million, four hundred four thousand, four hundred thirty-six".