39824145 has 12 divisors (see below), whose sum is σ = 69028596. Its totient is φ = 21239520.

The previous prime is 39824143. The next prime is 39824153. The reversal of 39824145 is 54142893.

It can be written as a sum of positive squares in 2 ways, for example, as 5143824 + 34680321 = 2268^2 + 5889^2 .

It is not a de Polignac number, because 39824145 - 2¹ = 39824143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39824143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442446 + ... + 442535.

It is an arithmetic number, because the mean of its divisors is an integer number (5752383).

Almost surely, 2^39824145 is an apocalyptic number.

It is an amenable number.

39824145 is a deficient number, since it is larger than the sum of its proper divisors (29204451).

39824145 is a wasteful number, since it uses less digits than its factorization.

39824145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884992 (or 884989 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 39824145 is about 6310.6374479921. The cubic root of 39824145 is about 341.4932733781.

The spelling of 39824145 in words is "thirty-nine million, eight hundred twenty-four thousand, one hundred forty-five".