39505749 has 24 divisors (see below), whose sum is σ = 55480896. Its totient is φ = 24998400.

The previous prime is 39505729. The next prime is 39505757. The reversal of 39505749 is 94750593.

It is not a de Polignac number, because 39505749 - 2⁵ = 39505717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39505749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39505729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204597 + ... + 204789.

It is an arithmetic number, because the mean of its divisors is an integer number (2311704).

Almost surely, 2^39505749 is an apocalyptic number.

It is an amenable number.

39505749 is a deficient number, since it is larger than the sum of its proper divisors (15975147).

39505749 is a wasteful number, since it uses less digits than its factorization.

39505749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 39505749 is about 6285.3598942304. The cubic root of 39505749 is about 340.5807519775.

The spelling of 39505749 in words is "thirty-nine million, five hundred five thousand, seven hundred forty-nine".