3781928 has 8 divisors (see below), whose sum is σ = 7091130. Its totient is φ = 1890960.

The previous prime is 3781909. The next prime is 3781951. The reversal of 3781928 is 8291873.

3781928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2696164 + 1085764 = 1642^2 + 1042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3781891 and 3781900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236363 + ... + 236378.

Almost surely, 2^3781928 is an apocalyptic number.

It is an amenable number.

3781928 is a deficient number, since it is larger than the sum of its proper divisors (3309202).

3781928 is a wasteful number, since it uses less digits than its factorization.

3781928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472747 (or 472743 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 3781928 is about 1944.7179744117. The cubic root of 3781928 is about 155.8013030213.

The spelling of 3781928 in words is "three million, seven hundred eighty-one thousand, nine hundred twenty-eight".