38378986 has 4 divisors (see below), whose sum is σ = 57568482. Its totient is φ = 19189492.

The previous prime is 38378983. The next prime is 38378999. The reversal of 38378986 is 68987383.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68987383 = 173 ⋅398771.

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 961 = 6195^2 + 31^2 .

It is not an unprimeable number, because it can be changed into a prime (38378983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9594745 + ... + 9594748.

Almost surely, 2^38378986 is an apocalyptic number.

38378986 is a deficient number, since it is larger than the sum of its proper divisors (19189496).

38378986 is a wasteful number, since it uses less digits than its factorization.

38378986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19189495.

The product of its digits is 1741824, while the sum is 52.

The square root of 38378986 is about 6195.0775620649. The cubic root of 38378986 is about 337.3115135926.

The spelling of 38378986 in words is "thirty-eight million, three hundred seventy-eight thousand, nine hundred eighty-six".