38129665 has 16 divisors (see below), whose sum is σ = 52422912. Its totient is φ = 26080704.

The previous prime is 38129629. The next prime is 38129669. The reversal of 38129665 is 56692183.

It is a cyclic number.

It is not a de Polignac number, because 38129665 - 2⁷ = 38129537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38129669) 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, 15927 + ... + 18163.

It is an arithmetic number, because the mean of its divisors is an integer number (3276432).

Almost surely, 2^38129665 is an apocalyptic number.

38129665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38129665 is a deficient number, since it is larger than the sum of its proper divisors (14293247).

38129665 is a wasteful number, since it uses less digits than its factorization.

38129665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736.

The product of its digits is 77760, while the sum is 40.

The square root of 38129665 is about 6174.9222667172. The cubic root of 38129665 is about 336.5795017730.

The spelling of 38129665 in words is "thirty-eight million, one hundred twenty-nine thousand, six hundred sixty-five".