39899894 has 8 divisors (see below), whose sum is σ = 62452080. Its totient is φ = 19082536.

The previous prime is 39899813. The next prime is 39899903. The reversal of 39899894 is 49899893.

39899894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×39899894² = 3184003082422472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 433649 + ... + 433740.

It is an arithmetic number, because the mean of its divisors is an integer number (7806510).

Almost surely, 2^39899894 is an apocalyptic number.

39899894 is a deficient number, since it is larger than the sum of its proper divisors (22552186).

39899894 is a wasteful number, since it uses less digits than its factorization.

39899894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867414.

The product of its digits is 5038848, while the sum is 59.

The square root of 39899894 is about 6316.6362884054. The cubic root of 39899894 is about 341.7096529166.

Subtracting 39899894 from its reverse (49899893), we obtain a palindrome (9999999).

The spelling of 39899894 in words is "thirty-nine million, eight hundred ninety-nine thousand, eight hundred ninety-four".