3778361 has 4 divisors (see below), whose sum is σ = 3798132. Its totient is φ = 3758592.

The previous prime is 3778343. The next prime is 3778391. The reversal of 3778361 is 1638773.

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 2421136 + 1357225 = 1556^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 3778361 - 2⁶ = 3778297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3778391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9596 + ... + 9981.

It is an arithmetic number, because the mean of its divisors is an integer number (949533).

Almost surely, 2^3778361 is an apocalyptic number.

It is an amenable number.

3778361 is a deficient number, since it is larger than the sum of its proper divisors (19771).

3778361 is a wasteful number, since it uses less digits than its factorization.

3778361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19770.

The product of its digits is 21168, while the sum is 35.

The square root of 3778361 is about 1943.8006585038. The cubic root of 3778361 is about 155.7523052561.

The spelling of 3778361 in words is "three million, seven hundred seventy-eight thousand, three hundred sixty-one".