38107987 has 4 divisors (see below), whose sum is σ = 39764880. Its totient is φ = 36451096.

The previous prime is 38107973. The next prime is 38107991. The reversal of 38107987 is 78970183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78970183 = 101 ⋅781883.

It is a cyclic number.

It is not a de Polignac number, because 38107987 - 2¹¹ = 38105939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38107907) 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, 828412 + ... + 828457.

It is an arithmetic number, because the mean of its divisors is an integer number (9941220).

Almost surely, 2^38107987 is an apocalyptic number.

38107987 is a deficient number, since it is larger than the sum of its proper divisors (1656893).

38107987 is a wasteful number, since it uses less digits than its factorization.

38107987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656892.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 38107987 is about 6173.1666914154. The cubic root of 38107987 is about 336.5157040832.

The spelling of 38107987 in words is "thirty-eight million, one hundred seven thousand, nine hundred eighty-seven".