3931404 has 48 divisors (see below), whose sum is σ = 9905280. Its totient is φ = 1209600.

The previous prime is 3931399. The next prime is 3931439. The reversal of 3931404 is 4041393.

It is a super-2 number, since 2×3931404² = 30911874822432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9604 + ... + 10004.

It is an arithmetic number, because the mean of its divisors is an integer number (206360).

Almost surely, 2^3931404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3931404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4952640).

3931404 is an abundant number, since it is smaller than the sum of its proper divisors (5973876).

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

3931404 is a wasteful number, since it uses less digits than its factorization.

3931404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 3931404 is about 1982.7768406959. The cubic root of 3931404 is about 157.8274567859.

Adding to 3931404 its reverse (4041393), we get a palindrome (7972797).

The spelling of 3931404 in words is "three million, nine hundred thirty-one thousand, four hundred four".