38135645 has 4 divisors (see below), whose sum is σ = 45762780. Its totient is φ = 30508512.

The previous prime is 38135627. The next prime is 38135651. The reversal of 38135645 is 54653183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54653183 = 13 ⋅4204091.

It can be written as a sum of positive squares in 2 ways, for example, as 27258841 + 10876804 = 5221^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 38135645 - 2²⁴ = 21358429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3813560 + ... + 3813569.

It is an arithmetic number, because the mean of its divisors is an integer number (11440695).

Almost surely, 2^38135645 is an apocalyptic number.

It is an amenable number.

38135645 is a deficient number, since it is larger than the sum of its proper divisors (7627135).

38135645 is an equidigital number, since it uses as much as digits as its factorization.

38135645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7627134.

The product of its digits is 43200, while the sum is 35.

The square root of 38135645 is about 6175.4064643552. The cubic root of 38135645 is about 336.5970964744.

The spelling of 38135645 in words is "thirty-eight million, one hundred thirty-five thousand, six hundred forty-five".