38855565 has 32 divisors (see below), whose sum is σ = 78946560. Its totient is φ = 17762112.

The previous prime is 38855561. The next prime is 38855567. The reversal of 38855565 is 56555883.

38855565 is a `hidden beast` number, since 3 + 8 + 85 + 5 + 565 = 666.

It is not a de Polignac number, because 38855565 - 2² = 38855561 is a prime.

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 38855565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38855561) 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, 19614 + ... + 21503.

It is an arithmetic number, because the mean of its divisors is an integer number (2467080).

Almost surely, 2^38855565 is an apocalyptic number.

38855565 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38855565 is an abundant number, since it is smaller than the sum of its proper divisors (40090995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38855565 is a wasteful number, since it uses less digits than its factorization.

38855565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41138 (or 41132 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 38855565 is about 6233.4232168208. The cubic root of 38855565 is about 338.7019857239.

The spelling of 38855565 in words is "thirty-eight million, eight hundred fifty-five thousand, five hundred sixty-five".