39861406 has 16 divisors (see below), whose sum is σ = 65608704. Its totient is φ = 18049824.

The previous prime is 39861401. The next prime is 39861439. The reversal of 39861406 is 60416893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39861401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13086 + ... + 15841.

It is an arithmetic number, because the mean of its divisors is an integer number (4100544).

Almost surely, 2^39861406 is an apocalyptic number.

39861406 is a deficient number, since it is larger than the sum of its proper divisors (25747298).

39861406 is a wasteful number, since it uses less digits than its factorization.

39861406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28995.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 39861406 is about 6313.5889951754. The cubic root of 39861406 is about 341.5997449206.

The spelling of 39861406 in words is "thirty-nine million, eight hundred sixty-one thousand, four hundred six".