38628785 has 16 divisors (see below), whose sum is σ = 50866704. Its totient is φ = 27985152.

The previous prime is 38628773. The next prime is 38628787. The reversal of 38628785 is 58782683.

It can be written as a sum of positive squares in 8 ways, for example, as 7134241 + 31494544 = 2671^2 + 5612^2 .

It is not a de Polignac number, because 38628785 - 2⁸ = 38628529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38628787) 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, 2162 + ... + 9051.

It is an arithmetic number, because the mean of its divisors is an integer number (3179169).

Almost surely, 2^38628785 is an apocalyptic number.

It is an amenable number.

38628785 is a deficient number, since it is larger than the sum of its proper divisors (12237919).

38628785 is a wasteful number, since it uses less digits than its factorization.

38628785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284.

The product of its digits is 645120, while the sum is 47.

The square root of 38628785 is about 6215.2059499264. The cubic root of 38628785 is about 338.0417563342.

The spelling of 38628785 in words is "thirty-eight million, six hundred twenty-eight thousand, seven hundred eighty-five".