39890900 has 72 divisors (see below), whose sum is σ = 101035200. Its totient is φ = 13665120.

The previous prime is 39890881. The next prime is 39890933. The reversal of 39890900 is 909893.

39890900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33719 + ... + 34881.

Almost surely, 2^39890900 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 39890900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50517600).

39890900 is an abundant number, since it is smaller than the sum of its proper divisors (61144300).

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

39890900 is a wasteful number, since it uses less digits than its factorization.

39890900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 39890900 is about 6315.9243187359. The cubic root of 39890900 is about 341.6839755921.

The spelling of 39890900 in words is "thirty-nine million, eight hundred ninety thousand, nine hundred".