3777449728 has 72 divisors (see below), whose sum is σ = 8166319616. Its totient is φ = 1733529600.

The previous prime is 3777449677. The next prime is 3777449729. The reversal of 3777449728 is 8279447773.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3777449729) 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, 599233 + ... + 605503.

Almost surely, 2^3777449728 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 3777449728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4083159808).

3777449728 is an abundant number, since it is smaller than the sum of its proper divisors (4388869888).

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

3777449728 is a wasteful number, since it uses less digits than its factorization.

3777449728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481 (or 6467 counting only the distinct ones).

The product of its digits is 16595712, while the sum is 58.

The square root of 3777449728 is about 61460.9610077812. The cubic root of 3777449728 is about 1557.3978270762.

The spelling of 3777449728 in words is "three billion, seven hundred seventy-seven million, four hundred forty-nine thousand, seven hundred twenty-eight".