39980000 has 60 divisors (see below), whose sum is σ = 98406000. Its totient is φ = 15984000.

The previous prime is 39979999. The next prime is 39980023. The reversal of 39980000 is 8993.

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, 19001 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (1640100).

Almost surely, 2^39980000 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 39980000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49203000).

39980000 is an abundant number, since it is smaller than the sum of its proper divisors (58426000).

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

39980000 is an equidigital number, since it uses as much as digits as its factorization.

39980000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 39980000 is about 6322.9739838149. The cubic root of 39980000 is about 341.9381806346.

Adding to 39980000 its reverse (8993), we get a palindrome (39988993).

The spelling of 39980000 in words is "thirty-nine million, nine hundred eighty thousand".