3778451838 has 72 divisors (see below), whose sum is σ = 9612483192. Its totient is φ = 1069441632.

The previous prime is 3778451837. The next prime is 3778451861. The reversal of 3778451838 is 8381548773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778451837) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 74356 + ... + 114392.

It is an arithmetic number, because the mean of its divisors is an integer number (133506711).

Almost surely, 2^3778451838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3778451838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4806241596).

3778451838 is an abundant number, since it is smaller than the sum of its proper divisors (5834031354).

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

3778451838 is a wasteful number, since it uses less digits than its factorization.

3778451838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40166 (or 40156 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 3778451838 is about 61469.1128779324. The cubic root of 3778451838 is about 1557.5355342648.

The spelling of 3778451838 in words is "three billion, seven hundred seventy-eight million, four hundred fifty-one thousand, eight hundred thirty-eight".