39018445 has 4 divisors (see below), whose sum is σ = 46822140. Its totient is φ = 31214752.

The previous prime is 39018443. The next prime is 39018479. The reversal of 39018445 is 54481093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54481093 = 313 ⋅174061.

It can be written as a sum of positive squares in 2 ways, for example, as 13586596 + 25431849 = 3686^2 + 5043^2 .

It is a cyclic number.

It is not a de Polignac number, because 39018445 - 2¹ = 39018443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39018445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39018443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901840 + ... + 3901849.

It is an arithmetic number, because the mean of its divisors is an integer number (11705535).

Almost surely, 2^39018445 is an apocalyptic number.

It is an amenable number.

39018445 is a deficient number, since it is larger than the sum of its proper divisors (7803695).

39018445 is an equidigital number, since it uses as much as digits as its factorization.

39018445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803694.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 39018445 is about 6246.4746057276. The cubic root of 39018445 is about 339.1745981788.

The spelling of 39018445 in words is "thirty-nine million, eighteen thousand, four hundred forty-five".