38778309394 has 16 divisors (see below), whose sum is σ = 63480676896. Its totient is φ = 17619487200.

The previous prime is 38778309389. The next prime is 38778309403. The reversal of 38778309394 is 49390387783.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294132 + ... + 405055.

It is an arithmetic number, because the mean of its divisors is an integer number (3967542306).

Almost surely, 2^38778309394 is an apocalyptic number.

38778309394 is a deficient number, since it is larger than the sum of its proper divisors (24702367502).

38778309394 is a wasteful number, since it uses less digits than its factorization.

38778309394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701721.

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 38778309394 in words is "thirty-eight billion, seven hundred seventy-eight million, three hundred nine thousand, three hundred ninety-four".