38709887 has 4 divisors (see below), whose sum is σ = 39109056. Its totient is φ = 38310720.

The previous prime is 38709883. The next prime is 38709889. The reversal of 38709887 is 78890783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78890783 = 409 ⋅192887.

It is a cyclic number.

It is not a de Polignac number, because 38709887 - 2² = 38709883 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 (38709883) 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, 199439 + ... + 199632.

It is an arithmetic number, because the mean of its divisors is an integer number (9777264).

Almost surely, 2^38709887 is an apocalyptic number.

38709887 is a deficient number, since it is larger than the sum of its proper divisors (399169).

38709887 is an equidigital number, since it uses as much as digits as its factorization.

38709887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399168.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 38709887 is about 6221.7270110477. The cubic root of 38709887 is about 338.2781663769.

The spelling of 38709887 in words is "thirty-eight million, seven hundred nine thousand, eight hundred eighty-seven".