39684890 has 48 divisors (see below), whose sum is σ = 85732992. Its totient is φ = 12931776.

The previous prime is 39684889. The next prime is 39684893. The reversal of 39684890 is 9848693.

39684890 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 not an unprimeable number, because it can be changed into a prime (39684893) by changing a digit.

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, 252692 + ... + 252848.

It is an arithmetic number, because the mean of its divisors is an integer number (1786104).

Almost surely, 2^39684890 is an apocalyptic number.

39684890 is an abundant number, since it is smaller than the sum of its proper divisors (46048102).

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

39684890 is a wasteful number, since it uses less digits than its factorization.

39684890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 39684890 is about 6299.5944313900. The cubic root of 39684890 is about 341.0947698857.

The spelling of 39684890 in words is "thirty-nine million, six hundred eighty-four thousand, eight hundred ninety".