39850565 has 16 divisors (see below), whose sum is σ = 49215600. Its totient is φ = 30958080.

The previous prime is 39850537. The next prime is 39850571. The reversal of 39850565 is 56505893.

It can be written as a sum of positive squares in 8 ways, for example, as 8288641 + 31561924 = 2879^2 + 5618^2 .

It is not a de Polignac number, because 39850565 - 2⁸ = 39850309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71267 + ... + 71823.

It is an arithmetic number, because the mean of its divisors is an integer number (3075975).

Almost surely, 2^39850565 is an apocalyptic number.

It is an amenable number.

39850565 is a deficient number, since it is larger than the sum of its proper divisors (9365035).

39850565 is a wasteful number, since it uses less digits than its factorization.

39850565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 39850565 is about 6312.7303918352. The cubic root of 39850565 is about 341.5687741230.

The spelling of 39850565 in words is "thirty-nine million, eight hundred fifty thousand, five hundred sixty-five".