3781428168 has 64 divisors (see below), whose sum is σ = 10822584960. Its totient is φ = 1078557696.

The previous prime is 3781428151. The next prime is 3781428169. The reversal of 3781428168 is 8618241873.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (3781428169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80646 + ... + 118602.

It is an arithmetic number, because the mean of its divisors is an integer number (169102890).

Almost surely, 2^3781428168 is an apocalyptic number.

It is an amenable number.

3781428168 is an abundant number, since it is smaller than the sum of its proper divisors (7041156792).

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

3781428168 is a wasteful number, since it uses less digits than its factorization.

3781428168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38566 (or 38562 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 3781428168 is about 61493.3180760316. The cubic root of 3781428168 is about 1557.9443898190.

The spelling of 3781428168 in words is "three billion, seven hundred eighty-one million, four hundred twenty-eight thousand, one hundred sixty-eight".