39031990 has 16 divisors (see below), whose sum is σ = 70725600. Its totient is φ = 15508800.

The previous prime is 39031987. The next prime is 39031991. The reversal of 39031990 is 9913093.

It is a happy number.

39031990 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 (39031991) 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 7 ways as a sum of consecutive naturals, for example, 11415 + ... + 14434.

It is an arithmetic number, because the mean of its divisors is an integer number (4420350).

Almost surely, 2^39031990 is an apocalyptic number.

39031990 is a deficient number, since it is larger than the sum of its proper divisors (31693610).

39031990 is a wasteful number, since it uses less digits than its factorization.

39031990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26007.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 39031990 is about 6247.5587232134. The cubic root of 39031990 is about 339.2138410585.

The spelling of 39031990 in words is "thirty-nine million, thirty-one thousand, nine hundred ninety".