3781225720 has 32 divisors (see below), whose sum is σ = 8955536400. Its totient is φ = 1432885248.

The previous prime is 3781225673. The next prime is 3781225741. The reversal of 3781225720 is 275221873.

3781225720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3781225720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2486889 + ... + 2488408.

Almost surely, 2^3781225720 is an apocalyptic number.

It is an amenable number.

3781225720 is an abundant number, since it is smaller than the sum of its proper divisors (5174310680).

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

3781225720 is a wasteful number, since it uses less digits than its factorization.

3781225720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975327 (or 4975323 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 3781225720 is about 61491.6719564528. The cubic root of 3781225720 is about 1557.9165865358.

The spelling of 3781225720 in words is "three billion, seven hundred eighty-one million, two hundred twenty-five thousand, seven hundred twenty".