38778042 has 16 divisors (see below), whose sum is σ = 77656320. Its totient is φ = 12909312.

The previous prime is 38778029. The next prime is 38778043. The reversal of 38778042 is 24087783.

It is not an unprimeable number, because it can be changed into a prime (38778043) 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, 1434 + ... + 8922.

It is an arithmetic number, because the mean of its divisors is an integer number (4853520).

Almost surely, 2^38778042 is an apocalyptic number.

38778042 is an abundant number, since it is smaller than the sum of its proper divisors (38878278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38778042 is a wasteful number, since it uses less digits than its factorization.

38778042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 38778042 is about 6227.2017792906. The cubic root of 38778042 is about 338.4765810675.

The spelling of 38778042 in words is "thirty-eight million, seven hundred seventy-eight thousand, forty-two".