3778420 has 24 divisors (see below), whose sum is σ = 8402184. Its totient is φ = 1422336.

The previous prime is 3778399. The next prime is 3778421. The reversal of 3778420 is 248773.

It can be written as a sum of positive squares in 4 ways, for example, as 45796 + 3732624 = 214^2 + 1932^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778421) 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 7 ways as a sum of consecutive naturals, for example, 5217 + ... + 5896.

It is an arithmetic number, because the mean of its divisors is an integer number (350091).

Almost surely, 2^3778420 is an apocalyptic number.

It is an amenable number.

3778420 is an abundant number, since it is smaller than the sum of its proper divisors (4623764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3778420 is a wasteful number, since it uses less digits than its factorization.

3778420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139 (or 11137 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 3778420 is about 1943.8158348979. The cubic root of 3778420 is about 155.7531159549.

The spelling of 3778420 in words is "three million, seven hundred seventy-eight thousand, four hundred twenty".