3778689 has 4 divisors (see below), whose sum is σ = 5038256. Its totient is φ = 2519124.

The previous prime is 3778681. The next prime is 3778717. The reversal of 3778689 is 9868773.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9868773 = 3 ⋅3289591.

It is not a de Polignac number, because 3778689 - 2³ = 3778681 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3778681) 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, 629779 + ... + 629784.

It is an arithmetic number, because the mean of its divisors is an integer number (1259564).

Almost surely, 2^3778689 is an apocalyptic number.

It is an amenable number.

3778689 is a deficient number, since it is larger than the sum of its proper divisors (1259567).

3778689 is a wasteful number, since it uses less digits than its factorization.

3778689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259566.

The product of its digits is 508032, while the sum is 48.

The square root of 3778689 is about 1943.8850274643. The cubic root of 3778689 is about 155.7568120849.

The spelling of 3778689 in words is "three million, seven hundred seventy-eight thousand, six hundred eighty-nine".