3781647842 has 32 divisors (see below), whose sum is σ = 6538371840. Its totient is φ = 1606875840.

The previous prime is 3781647827. The next prime is 3781647911. The reversal of 3781647842 is 2487461873.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907628 + ... + 911784.

It is an arithmetic number, because the mean of its divisors is an integer number (204324120).

Almost surely, 2^3781647842 is an apocalyptic number.

3781647842 is a deficient number, since it is larger than the sum of its proper divisors (2756723998).

3781647842 is a wasteful number, since it uses less digits than its factorization.

3781647842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706.

The product of its digits is 1806336, while the sum is 50.

The square root of 3781647842 is about 61495.1042116362. The cubic root of 3781647842 is about 1557.9745577197.

It can be divided in two parts, 37816 and 47842, that added together give a palindrome (85658).

The spelling of 3781647842 in words is "three billion, seven hundred eighty-one million, six hundred forty-seven thousand, eight hundred forty-two".