39906120 has 64 divisors (see below), whose sum is σ = 122653440. Its totient is φ = 10380800.

The previous prime is 39906077. The next prime is 39906121. The reversal of 39906120 is 2160993.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (39906121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865 + ... + 8975.

It is an arithmetic number, because the mean of its divisors is an integer number (1916460).

Almost surely, 2^39906120 is an apocalyptic number.

39906120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39906120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61326720).

39906120 is an abundant number, since it is smaller than the sum of its proper divisors (82747320).

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

39906120 is a wasteful number, since it uses less digits than its factorization.

39906120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8166 (or 8162 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 39906120 is about 6317.1290947708. The cubic root of 39906120 is about 341.7274255089.

The spelling of 39906120 in words is "thirty-nine million, nine hundred six thousand, one hundred twenty".