39669745 has 8 divisors (see below), whose sum is σ = 47854080. Its totient is φ = 31568880.

The previous prime is 39669743. The next prime is 39669757. The reversal of 39669745 is 54796693.

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

It is not a de Polignac number, because 39669745 - 2¹ = 39669743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39669743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19815 + ... + 21724.

It is an arithmetic number, because the mean of its divisors is an integer number (5981760).

Almost surely, 2^39669745 is an apocalyptic number.

It is an amenable number.

39669745 is a deficient number, since it is larger than the sum of its proper divisors (8184335).

39669745 is a wasteful number, since it uses less digits than its factorization.

39669745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41735.

The product of its digits is 1224720, while the sum is 49.

The square root of 39669745 is about 6298.3922551712. The cubic root of 39669745 is about 341.0513735403.

The spelling of 39669745 in words is "thirty-nine million, six hundred sixty-nine thousand, seven hundred forty-five".