3778231 has 4 divisors (see below), whose sum is σ = 3782592. Its totient is φ = 3773872.

The previous prime is 3778217. The next prime is 3778237. The reversal of 3778231 is 1328773.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1328773 = 431 ⋅3083.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3778231 is a prime.

It is a super-2 number, since 2×3778231² = 28550058978722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3778193 and 3778202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (945648).

Almost surely, 2^3778231 is an apocalyptic number.

3778231 is a deficient number, since it is larger than the sum of its proper divisors (4361).

3778231 is a wasteful number, since it uses less digits than its factorization.

3778231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360.

The product of its digits is 7056, while the sum is 31.

The square root of 3778231 is about 1943.7672185733. The cubic root of 3778231 is about 155.7505189409.

The spelling of 3778231 in words is "three million, seven hundred seventy-eight thousand, two hundred thirty-one".