3938390 has 16 divisors (see below), whose sum is σ = 7506432. Its totient is φ = 1482624.

The previous prime is 3938383. The next prime is 3938393. The reversal of 3938390 is 938393.

It is a self number, because there is not a number n which added to its sum of digits gives 3938390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938393) 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, 11414 + ... + 11753.

It is an arithmetic number, because the mean of its divisors is an integer number (469152).

Almost surely, 2^3938390 is an apocalyptic number.

3938390 is a deficient number, since it is larger than the sum of its proper divisors (3568042).

3938390 is a wasteful number, since it uses less digits than its factorization.

3938390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23191.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 3938390 is about 1984.5377295481. The cubic root of 3938390 is about 157.9208865267.

The spelling of 3938390 in words is "three million, nine hundred thirty-eight thousand, three hundred ninety".