39987406 has 8 divisors (see below), whose sum is σ = 60018840. Its totient is φ = 19981128.

The previous prime is 39987403. The next prime is 39987407. The reversal of 39987406 is 60478993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39987403) 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 3 ways as a sum of consecutive naturals, for example, 1621 + ... + 9088.

It is an arithmetic number, because the mean of its divisors is an integer number (7502355).

Almost surely, 2^39987406 is an apocalyptic number.

39987406 is a deficient number, since it is larger than the sum of its proper divisors (20031434).

39987406 is a wasteful number, since it uses less digits than its factorization.

39987406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12578.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 39987406 is about 6323.5595988336. The cubic root of 39987406 is about 341.9592931727.

The spelling of 39987406 in words is "thirty-nine million, nine hundred eighty-seven thousand, four hundred six".