39897906 has 16 divisors (see below), whose sum is σ = 80081184. Its totient is φ = 13251744.

The previous prime is 39897883. The next prime is 39897911. The reversal of 39897906 is 60979893.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10051 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (5005074).

Almost surely, 2^39897906 is an apocalyptic number.

39897906 is an abundant number, since it is smaller than the sum of its proper divisors (40183278).

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

39897906 is a wasteful number, since it uses less digits than its factorization.

39897906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23785.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 39897906 is about 6316.4789242109. The cubic root of 39897906 is about 341.7039776294.

The spelling of 39897906 in words is "thirty-nine million, eight hundred ninety-seven thousand, nine hundred six".