39378645 has 24 divisors (see below), whose sum is σ = 71225856. Its totient is φ = 20088288.

The previous prime is 39378643. The next prime is 39378667. The reversal of 39378645 is 54687393.

It is not a de Polignac number, because 39378645 - 2¹ = 39378643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 39378645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39378643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17989 + ... + 20058.

It is an arithmetic number, because the mean of its divisors is an integer number (2967744).

Almost surely, 2^39378645 is an apocalyptic number.

It is an amenable number.

39378645 is a deficient number, since it is larger than the sum of its proper divisors (31847211).

39378645 is a wasteful number, since it uses less digits than its factorization.

39378645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38081 (or 38078 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 39378645 is about 6275.2406328363. The cubic root of 39378645 is about 340.2151032159.

The spelling of 39378645 in words is "thirty-nine million, three hundred seventy-eight thousand, six hundred forty-five".