38998187 has 4 divisors (see below), whose sum is σ = 41292216. Its totient is φ = 36704160.

The previous prime is 38998181. The next prime is 38998199. The reversal of 38998187 is 78189983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78189983 = 61 ⋅1281803.

It is a cyclic number.

It is not a de Polignac number, because 38998187 - 2⁶ = 38998123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38998181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146989 + ... + 1147022.

It is an arithmetic number, because the mean of its divisors is an integer number (10323054).

Almost surely, 2^38998187 is an apocalyptic number.

38998187 is a deficient number, since it is larger than the sum of its proper divisors (2294029).

38998187 is a wasteful number, since it uses less digits than its factorization.

38998187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294028.

The product of its digits is 870912, while the sum is 53.

The square root of 38998187 is about 6244.8528405400. The cubic root of 38998187 is about 339.1158892915.

The spelling of 38998187 in words is "thirty-eight million, nine hundred ninety-eight thousand, one hundred eighty-seven".