3780638 has 4 divisors (see below), whose sum is σ = 5670960. Its totient is φ = 1890318.

The previous prime is 3780619. The next prime is 3780653. The reversal of 3780638 is 8360873.

3780638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8360873 = 107 ⋅78139.

It is a junction number, because it is equal to n+sod(n) for n = 3780598 and 3780607.

It is a congruent number.

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, 945158 + ... + 945161.

It is an arithmetic number, because the mean of its divisors is an integer number (1417740).

Almost surely, 2^3780638 is an apocalyptic number.

3780638 is a deficient number, since it is larger than the sum of its proper divisors (1890322).

3780638 is a wasteful number, since it uses less digits than its factorization.

3780638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890321.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 3780638 is about 1944.3862784951. The cubic root of 3780638 is about 155.7835866134.

The spelling of 3780638 in words is "three million, seven hundred eighty thousand, six hundred thirty-eight".