3778392385 has 4 divisors (see below), whose sum is σ = 4534070868. Its totient is φ = 3022713904.

The previous prime is 3778392379. The next prime is 3778392407. The reversal of 3778392385 is 5832938773.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2893686849 + 884705536 = 53793^2 + 29744^2 .

It is a cyclic number.

It is not a de Polignac number, because 3778392385 - 2³ = 3778392377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377839234 + ... + 377839243.

It is an arithmetic number, because the mean of its divisors is an integer number (1133517717).

Almost surely, 2^3778392385 is an apocalyptic number.

It is an amenable number.

3778392385 is a deficient number, since it is larger than the sum of its proper divisors (755678483).

3778392385 is an equidigital number, since it uses as much as digits as its factorization.

3778392385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755678482.

The product of its digits is 7620480, while the sum is 55.

The square root of 3778392385 is about 61468.6292754280. The cubic root of 3778392385 is about 1557.5273650772.

The spelling of 3778392385 in words is "three billion, seven hundred seventy-eight million, three hundred ninety-two thousand, three hundred eighty-five".