3781481672 has 32 divisors (see below), whose sum is σ = 7157596320. Its totient is φ = 1872850560.

The previous prime is 3781481657. The next prime is 3781481699. The reversal of 3781481672 is 2761841873.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 534623 + ... + 541649.

It is an arithmetic number, because the mean of its divisors is an integer number (223674885).

Almost surely, 2^3781481672 is an apocalyptic number.

It is an amenable number.

3781481672 is a deficient number, since it is larger than the sum of its proper divisors (3376114648).

3781481672 is a wasteful number, since it uses less digits than its factorization.

3781481672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7661 (or 7657 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 3781481672 is about 61493.7531136294. The cubic root of 3781481672 is about 1557.9517376481.

The spelling of 3781481672 in words is "three billion, seven hundred eighty-one million, four hundred eighty-one thousand, six hundred seventy-two".