38715145 has 24 divisors (see below), whose sum is σ = 55917000. Its totient is φ = 25627392.

The previous prime is 38715143. The next prime is 38715161. The reversal of 38715145 is 54151783.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 423801 + 38291344 = 651^2 + 6188^2 .

It is not a de Polignac number, because 38715145 - 2¹ = 38715143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38715145.

It is not an unprimeable number, because it can be changed into a prime (38715143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4381 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (2329875).

Almost surely, 2^38715145 is an apocalyptic number.

38715145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38715145 is a deficient number, since it is larger than the sum of its proper divisors (17201855).

38715145 is a wasteful number, since it uses less digits than its factorization.

38715145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5497 (or 5490 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The square root of 38715145 is about 6222.1495481867. The cubic root of 38715145 is about 338.2934818962.

The spelling of 38715145 in words is "thirty-eight million, seven hundred fifteen thousand, one hundred forty-five".