3778440 has 96 divisors (see below), whose sum is σ = 12156480. Its totient is φ = 937728.

The previous prime is 3778429. The next prime is 3778447. The reversal of 3778440 is 448773.

It is a happy number.

3778440 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3778447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102102 + ... + 102138.

It is an arithmetic number, because the mean of its divisors is an integer number (126630).

Almost surely, 2^3778440 is an apocalyptic number.

3778440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3778440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6078240).

3778440 is an abundant number, since it is smaller than the sum of its proper divisors (8378040).

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

3778440 is a wasteful number, since it uses less digits than its factorization.

3778440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 3778440 is about 1943.8209794114. The cubic root of 3778440 is about 155.7533907662.

The spelling of 3778440 in words is "three million, seven hundred seventy-eight thousand, four hundred forty".