38863978 has 4 divisors (see below), whose sum is σ = 58295970. Its totient is φ = 19431988.

The previous prime is 38863969. The next prime is 38863991. The reversal of 38863978 is 87936883.

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: 87936883 = 19 ⋅4628257.

It can be written as a sum of positive squares in only one way, i.e., 38850289 + 13689 = 6233^2 + 117^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9715993 + ... + 9715996.

Almost surely, 2^38863978 is an apocalyptic number.

38863978 is a deficient number, since it is larger than the sum of its proper divisors (19431992).

38863978 is a wasteful number, since it uses less digits than its factorization.

38863978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19431991.

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

The square root of 38863978 is about 6234.0980101375. The cubic root of 38863978 is about 338.7264291910.

The spelling of 38863978 in words is "thirty-eight million, eight hundred sixty-three thousand, nine hundred seventy-eight".