3778820 has 12 divisors (see below), whose sum is σ = 7935564. Its totient is φ = 1511520.

The previous prime is 3778793. The next prime is 3778823. The reversal of 3778820 is 288773.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2483776 + 1295044 = 1576^2 + 1138^2 .

It is not an unprimeable number, because it can be changed into a prime (3778823) 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, 94451 + ... + 94490.

It is an arithmetic number, because the mean of its divisors is an integer number (661297).

Almost surely, 2^3778820 is an apocalyptic number.

It is an amenable number.

3778820 is an abundant number, since it is smaller than the sum of its proper divisors (4156744).

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

3778820 is a wasteful number, since it uses less digits than its factorization.

3778820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188950 (or 188948 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 3778820 is about 1943.9187225808. The cubic root of 3778820 is about 155.7586119954.

The spelling of 3778820 in words is "three million, seven hundred seventy-eight thousand, eight hundred twenty".