38778393 has 8 divisors (see below), whose sum is σ = 51768288. Its totient is φ = 25820384.

The previous prime is 38778379. The next prime is 38778401. The reversal of 38778393 is 39387783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38778393 - 2⁵ = 38778361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38778353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4971 + ... + 10112.

It is an arithmetic number, because the mean of its divisors is an integer number (6471036).

Almost surely, 2^38778393 is an apocalyptic number.

It is an amenable number.

38778393 is a deficient number, since it is larger than the sum of its proper divisors (12989895).

38778393 is a wasteful number, since it uses less digits than its factorization.

38778393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15943.

The product of its digits is 762048, while the sum is 48.

The square root of 38778393 is about 6227.2299620297. The cubic root of 38778393 is about 338.4776023063.

The spelling of 38778393 in words is "thirty-eight million, seven hundred seventy-eight thousand, three hundred ninety-three".