38663145 has 12 divisors (see below), whose sum is σ = 67016196. Its totient is φ = 20620320.

The previous prime is 38663057. The next prime is 38663147. The reversal of 38663145 is 54136683.

It can be written as a sum of positive squares in 2 ways, for example, as 20820969 + 17842176 = 4563^2 + 4224^2 .

It is not a de Polignac number, because 38663145 - 2⁷ = 38663017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38663147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429546 + ... + 429635.

It is an arithmetic number, because the mean of its divisors is an integer number (5584683).

Almost surely, 2^38663145 is an apocalyptic number.

It is an amenable number.

38663145 is a deficient number, since it is larger than the sum of its proper divisors (28353051).

38663145 is a wasteful number, since it uses less digits than its factorization.

38663145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859192 (or 859189 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 38663145 is about 6217.9695238880. The cubic root of 38663145 is about 338.1419551246.

The spelling of 38663145 in words is "thirty-eight million, six hundred sixty-three thousand, one hundred forty-five".