3778438773 has 8 divisors (see below), whose sum is σ = 5070007648. Its totient is φ = 2502914544.

The previous prime is 3778438693. The next prime is 3778438777. The reversal of 3778438773 is 3778348773.

It is a happy number.

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

It is not a de Polignac number, because 3778438773 - 2¹⁰ = 3778437749 is a prime.

It is a super-2 number, since 2×3778438773² = 28553199122619491058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778438777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4010611 + ... + 4011552.

It is an arithmetic number, because the mean of its divisors is an integer number (633750956).

Almost surely, 2^3778438773 is an apocalyptic number.

It is an amenable number.

3778438773 is a deficient number, since it is larger than the sum of its proper divisors (1291568875).

3778438773 is a wasteful number, since it uses less digits than its factorization.

3778438773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022323.

The product of its digits is 16595712, while the sum is 57.

The square root of 3778438773 is about 61469.0066049550. The cubic root of 3778438773 is about 1557.5337390653.

Subtracting from 3778438773 its reverse (3778348773), we obtain a square (90000 = 300²).

The spelling of 3778438773 in words is "three billion, seven hundred seventy-eight million, four hundred thirty-eight thousand, seven hundred seventy-three".