38778379 has 2 divisors, whose sum is σ = 38778380. Its totient is φ = 38778378.

The previous prime is 38778361. The next prime is 38778401. The reversal of 38778379 is 97387783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38778379 - 2¹⁵ = 38745611 is a prime.

It is not a weakly prime, because it can be changed into another prime (38778319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19389189 + 19389190.

It is an arithmetic number, because the mean of its divisors is an integer number (19389190).

Almost surely, 2^38778379 is an apocalyptic number.

38778379 is a deficient number, since it is larger than the sum of its proper divisors (1).

38778379 is an equidigital number, since it uses as much as digits as its factorization.

38778379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 52.

The square root of 38778379 is about 6227.2288379343. The cubic root of 38778379 is about 338.4775615732.

The spelling of 38778379 in words is "thirty-eight million, seven hundred seventy-eight thousand, three hundred seventy-nine".