3931398 has 24 divisors (see below), whose sum is σ = 8749728. Its totient is φ = 1274832.

The previous prime is 3931393. The next prime is 3931399. The reversal of 3931398 is 8931393.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2286 + ... + 3617.

It is an arithmetic number, because the mean of its divisors is an integer number (364572).

Almost surely, 2^3931398 is an apocalyptic number.

3931398 is an abundant number, since it is smaller than the sum of its proper divisors (4818330).

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

3931398 is a wasteful number, since it uses less digits than its factorization.

3931398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948 (or 5945 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 3931398 is about 1982.7753276657. The cubic root of 3931398 is about 157.8273764952.

The spelling of 3931398 in words is "three million, nine hundred thirty-one thousand, three hundred ninety-eight".