39429845 has 32 divisors (see below), whose sum is σ = 61313280. Its totient is φ = 23639040.

The previous prime is 39429829. The next prime is 39429847. The reversal of 39429845 is 54892493.

It is not a de Polignac number, because 39429845 - 2⁴ = 39429829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39429796 and 39429805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39429847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6365 + ... + 10925.

It is an arithmetic number, because the mean of its divisors is an integer number (1916040).

Almost surely, 2^39429845 is an apocalyptic number.

39429845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39429845 is a deficient number, since it is larger than the sum of its proper divisors (21883435).

39429845 is a wasteful number, since it uses less digits than its factorization.

39429845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605.

The product of its digits is 311040, while the sum is 44.

The square root of 39429845 is about 6279.3188324849. The cubic root of 39429845 is about 340.3624882546.

The spelling of 39429845 in words is "thirty-nine million, four hundred twenty-nine thousand, eight hundred forty-five".