39240305 has 16 divisors (see below), whose sum is σ = 50859984. Its totient is φ = 28892160.

The previous prime is 39240293. The next prime is 39240307. The reversal of 39240305 is 50304293.

It can be written as a sum of positive squares in 8 ways, for example, as 1442401 + 37797904 = 1201^2 + 6148^2 .

It is not a de Polignac number, because 39240305 - 2⁶ = 39240241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39240307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29045 + ... + 30365.

It is an arithmetic number, because the mean of its divisors is an integer number (3178749).

Almost surely, 2^39240305 is an apocalyptic number.

It is an amenable number.

39240305 is a deficient number, since it is larger than the sum of its proper divisors (11619679).

39240305 is a wasteful number, since it uses less digits than its factorization.

39240305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 39240305 is about 6264.2082500504. The cubic root of 39240305 is about 339.8162357599.

Adding to 39240305 its reverse (50304293), we get a palindrome (89544598).

The spelling of 39240305 in words is "thirty-nine million, two hundred forty thousand, three hundred five".