39385989 has 6 divisors (see below), whose sum is σ = 56890886. Its totient is φ = 26257320.

The previous prime is 39385987. The next prime is 39386023. The reversal of 39385989 is 98958393.

It can be written as a sum of positive squares in only one way, i.e., 30636225 + 8749764 = 5535^2 + 2958^2 .

It is not a de Polignac number, because 39385989 - 2¹ = 39385987 is a prime.

It is a super-2 number, since 2×39385989² = 3102512259016242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39385987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2188102 + ... + 2188119.

Almost surely, 2^39385989 is an apocalyptic number.

It is an amenable number.

39385989 is a deficient number, since it is larger than the sum of its proper divisors (17504897).

39385989 is a wasteful number, since it uses less digits than its factorization.

39385989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376227 (or 4376224 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 39385989 is about 6275.8257623997. The cubic root of 39385989 is about 340.2362516024.

The spelling of 39385989 in words is "thirty-nine million, three hundred eighty-five thousand, nine hundred eighty-nine".