3931645406 has 24 divisors (see below), whose sum is σ = 6392292480. Its totient is φ = 1812822336.

The previous prime is 3931645373. The next prime is 3931645409. The reversal of 3931645406 is 6045461393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931645409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 376451 + ... + 386753.

It is an arithmetic number, because the mean of its divisors is an integer number (266345520).

Almost surely, 2^3931645406 is an apocalyptic number.

3931645406 is a deficient number, since it is larger than the sum of its proper divisors (2460647074).

3931645406 is a wasteful number, since it uses less digits than its factorization.

3931645406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460 (or 11447 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 3931645406 is about 62702.8341145757. The cubic root of 3931645406 is about 1578.3068715981.

The spelling of 3931645406 in words is "three billion, nine hundred thirty-one million, six hundred forty-five thousand, four hundred six".