39791890 has 16 divisors (see below), whose sum is σ = 75395520. Its totient is φ = 15078960.

The previous prime is 39791839. The next prime is 39791957. The reversal of 39791890 is 9819793.

39791890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 39791890.

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 7 ways as a sum of consecutive naturals, for example, 104526 + ... + 104905.

It is an arithmetic number, because the mean of its divisors is an integer number (4712220).

Almost surely, 2^39791890 is an apocalyptic number.

39791890 is a deficient number, since it is larger than the sum of its proper divisors (35603630).

39791890 is a wasteful number, since it uses less digits than its factorization.

39791890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209457.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 39791890 is about 6308.0813247770. The cubic root of 39791890 is about 341.4010526022.

The spelling of 39791890 in words is "thirty-nine million, seven hundred ninety-one thousand, eight hundred ninety".