3966438 has 16 divisors (see below), whose sum is σ = 9066240. Its totient is φ = 1133256.

The previous prime is 3966433. The next prime is 3966439. The reversal of 3966438 is 8346693.

It is a junction number, because it is equal to n+sod(n) for n = 3966396 and 3966405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966433) 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, 47178 + ... + 47261.

It is an arithmetic number, because the mean of its divisors is an integer number (566640).

Almost surely, 2^3966438 is an apocalyptic number.

3966438 is an abundant number, since it is smaller than the sum of its proper divisors (5099802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3966438 is a wasteful number, since it uses less digits than its factorization.

3966438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94451.

The product of its digits is 93312, while the sum is 39.

The square root of 3966438 is about 1991.5918256510. The cubic root of 3966438 is about 158.2948880496.

The spelling of 3966438 in words is "three million, nine hundred sixty-six thousand, four hundred thirty-eight".