39040000 has 110 divisors (see below), whose sum is σ = 99119834. Its totient is φ = 15360000.

The previous prime is 39039991. The next prime is 39040013. The reversal of 39040000 is 4093.

It can be written as a sum of positive squares in 5 ways, for example, as 26873856 + 12166144 = 5184^2 + 3488^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 639970 + ... + 640030.

Almost surely, 2^39040000 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 39040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49559917).

39040000 is an abundant number, since it is smaller than the sum of its proper divisors (60079834).

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

39040000 is an frugal number, since it uses more digits than its factorization.

39040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 39040000 is about 6248.1997407253. The cubic root of 39040000 is about 339.2370435395.

Adding to 39040000 its reverse (4093), we get a palindrome (39044093).

The spelling of 39040000 in words is "thirty-nine million, forty thousand".