3813778 has 4 divisors (see below), whose sum is σ = 5720670. Its totient is φ = 1906888.

The previous prime is 3813773. The next prime is 3813811. The reversal of 3813778 is 8773183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8773183 = 83 ⋅105701.

It can be written as a sum of positive squares in only one way, i.e., 3560769 + 253009 = 1887^2 + 503^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3813773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953443 + ... + 953446.

Almost surely, 2^3813778 is an apocalyptic number.

3813778 is a deficient number, since it is larger than the sum of its proper divisors (1906892).

3813778 is a wasteful number, since it uses less digits than its factorization.

3813778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906891.

The product of its digits is 28224, while the sum is 37.

The square root of 3813778 is about 1952.8896538207. The cubic root of 3813778 is about 156.2374479517.

The spelling of 3813778 in words is "three million, eight hundred thirteen thousand, seven hundred seventy-eight".