3778239 has 4 divisors (see below), whose sum is σ = 5037656. Its totient is φ = 2518824.

The previous prime is 3778237. The next prime is 3778241. The reversal of 3778239 is 9328773.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3778237) and next prime (3778241).

It is not a de Polignac number, because 3778239 - 2¹ = 3778237 is a prime.

It is a super-2 number, since 2×3778239² = 28550179882242, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3778197 and 3778206.

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, 629704 + ... + 629709.

It is an arithmetic number, because the mean of its divisors is an integer number (1259414).

Almost surely, 2^3778239 is an apocalyptic number.

3778239 is a deficient number, since it is larger than the sum of its proper divisors (1259417).

3778239 is a wasteful number, since it uses less digits than its factorization.

3778239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259416.

The product of its digits is 63504, while the sum is 39.

The square root of 3778239 is about 1943.7692764317. The cubic root of 3778239 is about 155.7506288691.

The spelling of 3778239 in words is "three million, seven hundred seventy-eight thousand, two hundred thirty-nine".