39906040 has 16 divisors (see below), whose sum is σ = 89788680. Its totient is φ = 15962400.

The previous prime is 39906029. The next prime is 39906049. The reversal of 39906040 is 4060993.

39906040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 39905993 and 39906011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39906049) 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 3 ways as a sum of consecutive naturals, for example, 498786 + ... + 498865.

Almost surely, 2^39906040 is an apocalyptic number.

It is an amenable number.

39906040 is an abundant number, since it is smaller than the sum of its proper divisors (49882640).

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

39906040 is a wasteful number, since it uses less digits than its factorization.

39906040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997662 (or 997658 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 39906040 is about 6317.1227627774. The cubic root of 39906040 is about 341.7271971545.

The spelling of 39906040 in words is "thirty-nine million, nine hundred six thousand, forty".