39923345 has 32 divisors (see below), whose sum is σ = 60293376. Its totient is φ = 24858240.

The previous prime is 39923311. The next prime is 39923347. The reversal of 39923345 is 54332993.

It is not a de Polignac number, because 39923345 - 2¹⁴ = 39906961 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 39923299 and 39923308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39923347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46157 + ... + 47013.

It is an arithmetic number, because the mean of its divisors is an integer number (1884168).

Almost surely, 2^39923345 is an apocalyptic number.

39923345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39923345 is a deficient number, since it is larger than the sum of its proper divisors (20370031).

39923345 is an equidigital number, since it uses as much as digits as its factorization.

39923345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 880 counting only the distinct ones).

The product of its digits is 87480, while the sum is 38.

The square root of 39923345 is about 6318.4923043397. The cubic root of 39923345 is about 341.7765859568.

It can be divided in two parts, 3992 and 3345, that added together give a palindrome (7337).

The spelling of 39923345 in words is "thirty-nine million, nine hundred twenty-three thousand, three hundred forty-five".