39916389 has 8 divisors (see below), whose sum is σ = 54016480. Its totient is φ = 26213616.

The previous prime is 39916363. The next prime is 39916399. The reversal of 39916389 is 98361993.

It is a happy number.

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

It is not a de Polignac number, because 39916389 - 2¹¹ = 39914341 is a prime.

It is a super-2 number, since 2×39916389² = 3186636221598642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39916309) 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 7 ways as a sum of consecutive naturals, for example, 99094 + ... + 99495.

It is an arithmetic number, because the mean of its divisors is an integer number (6752060).

Almost surely, 2^39916389 is an apocalyptic number.

It is an amenable number.

39916389 is a deficient number, since it is larger than the sum of its proper divisors (14100091).

39916389 is a wasteful number, since it uses less digits than its factorization.

39916389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198659.

The product of its digits is 314928, while the sum is 48.

The square root of 39916389 is about 6317.9418325907. The cubic root of 39916389 is about 341.7567351150.

The spelling of 39916389 in words is "thirty-nine million, nine hundred sixteen thousand, three hundred eighty-nine".