38642565 has 32 divisors (see below), whose sum is σ = 67858560. Its totient is φ = 18660096.

The previous prime is 38642563. The next prime is 38642621. The reversal of 38642565 is 56524683.

It is not a de Polignac number, because 38642565 - 2¹ = 38642563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38642563) 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, 8466 + ... + 12204.

It is an arithmetic number, because the mean of its divisors is an integer number (2120580).

Almost surely, 2^38642565 is an apocalyptic number.

It is an amenable number.

38642565 is a deficient number, since it is larger than the sum of its proper divisors (29215995).

38642565 is a wasteful number, since it uses less digits than its factorization.

38642565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813.

The product of its digits is 172800, while the sum is 39.

The square root of 38642565 is about 6216.3144225497. The cubic root of 38642565 is about 338.0819479651.

The spelling of 38642565 in words is "thirty-eight million, six hundred forty-two thousand, five hundred sixty-five".