38780565 has 16 divisors (see below), whose sum is σ = 62620800. Its totient is φ = 20492352.

The previous prime is 38780561. The next prime is 38780603. The reversal of 38780565 is 56508783.

It is not a de Polignac number, because 38780565 - 2² = 38780561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38780561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10225 + ... + 13494.

It is an arithmetic number, because the mean of its divisors is an integer number (3913800).

Almost surely, 2^38780565 is an apocalyptic number.

It is an amenable number.

38780565 is a deficient number, since it is larger than the sum of its proper divisors (23840235).

38780565 is a wasteful number, since it uses less digits than its factorization.

38780565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23836.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 38780565 is about 6227.4043549460. The cubic root of 38780565 is about 338.4839216298.

The spelling of 38780565 in words is "thirty-eight million, seven hundred eighty thousand, five hundred sixty-five".