39853845 has 24 divisors (see below), whose sum is σ = 70768152. Its totient is φ = 20736000.

The previous prime is 39853843. The next prime is 39853867. The reversal of 39853845 is 54835893.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2802276 + 37051569 = 1674^2 + 6087^2 .

It is not a de Polignac number, because 39853845 - 2¹ = 39853843 is a prime.

It is a super-2 number, since 2×39853845² = 3176657922568050, which contains 22 as substring.

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 39853845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39853843) 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 23 ways as a sum of consecutive naturals, for example, 8956 + ... + 12645.

It is an arithmetic number, because the mean of its divisors is an integer number (2948673).

Almost surely, 2^39853845 is an apocalyptic number.

It is an amenable number.

39853845 is a deficient number, since it is larger than the sum of its proper divisors (30914307).

39853845 is a wasteful number, since it uses less digits than its factorization.

39853845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21653 (or 21650 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 39853845 is about 6312.9901789881. The cubic root of 39853845 is about 341.5781450888.

The spelling of 39853845 in words is "thirty-nine million, eight hundred fifty-three thousand, eight hundred forty-five".