39670869 has 16 divisors (see below), whose sum is σ = 62536320. Its totient is φ = 21887040.

The previous prime is 39670823. The next prime is 39670907. The reversal of 39670869 is 96807693.

It is a happy number.

39670869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-39670869 is a prime.

It is a super-2 number, since 2×39670869² = 3147555694430322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39670369) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31962 + ... + 33179.

It is an arithmetic number, because the mean of its divisors is an integer number (3908520).

Almost surely, 2^39670869 is an apocalyptic number.

It is an amenable number.

39670869 is a deficient number, since it is larger than the sum of its proper divisors (22865451).

39670869 is a wasteful number, since it uses less digits than its factorization.

39670869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65180.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 39670869 is about 6298.4814836594. The cubic root of 39670869 is about 341.0545946191.

The spelling of 39670869 in words is "thirty-nine million, six hundred seventy thousand, eight hundred sixty-nine".