38688887 has 4 divisors (see below), whose sum is σ = 39418920. Its totient is φ = 37958856.

The previous prime is 38688857. The next prime is 38688901. The reversal of 38688887 is 78888683.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38688887 - 2¹² = 38684791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38688817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364937 + ... + 365042.

It is an arithmetic number, because the mean of its divisors is an integer number (9854730).

Almost surely, 2^38688887 is an apocalyptic number.

38688887 is a deficient number, since it is larger than the sum of its proper divisors (730033).

38688887 is an equidigital number, since it uses as much as digits as its factorization.

38688887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730032.

The product of its digits is 4128768, while the sum is 56.

The square root of 38688887 is about 6220.0391477868. The cubic root of 38688887 is about 338.2169836745.

The spelling of 38688887 in words is "thirty-eight million, six hundred eighty-eight thousand, eight hundred eighty-seven".