3930638 has 16 divisors (see below), whose sum is σ = 6285600. Its totient is φ = 1837056.

The previous prime is 3930637. The next prime is 3930653. The reversal of 3930638 is 8360393.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3930637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6263 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (392850).

Almost surely, 2^3930638 is an apocalyptic number.

3930638 is a deficient number, since it is larger than the sum of its proper divisors (2354962).

3930638 is a wasteful number, since it uses less digits than its factorization.

3930638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 3930638 is about 1982.5836678436. The cubic root of 3930638 is about 157.8172056826.

The spelling of 3930638 in words is "three million, nine hundred thirty thousand, six hundred thirty-eight".