3777728 has 28 divisors (see below), whose sum is σ = 7616952. Its totient is φ = 1858560.

The previous prime is 3777721. The next prime is 3777749. The reversal of 3777728 is 8277773.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3777721) 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, 3848 + ... + 4728.

It is an arithmetic number, because the mean of its divisors is an integer number (272034).

Almost surely, 2^3777728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3777728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3808476).

3777728 is an abundant number, since it is smaller than the sum of its proper divisors (3839224).

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

3777728 is an equidigital number, since it uses as much as digits as its factorization.

3777728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its digits is 115248, while the sum is 41.

The square root of 3777728 is about 1943.6378263452. The cubic root of 3777728 is about 155.7436068888.

The spelling of 3777728 in words is "three million, seven hundred seventy-seven thousand, seven hundred twenty-eight".