3996640468 has 6 divisors (see below), whose sum is σ = 6994120826. Its totient is φ = 1998320232.

The previous prime is 3996640411. The next prime is 3996640469. The reversal of 3996640468 is 8640466993.

It can be written as a sum of positive squares in only one way, i.e., 2803490704 + 1193149764 = 52948^2 + 34542^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996640469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499580055 + ... + 499580062.

Almost surely, 2^3996640468 is an apocalyptic number.

It is an amenable number.

3996640468 is a deficient number, since it is larger than the sum of its proper divisors (2997480358).

3996640468 is a wasteful number, since it uses less digits than its factorization.

3996640468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999160121 (or 999160119 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 55.

The square root of 3996640468 is about 63218.9881918400. The cubic root of 3996640468 is about 1586.9565171066.

The spelling of 3996640468 in words is "three billion, nine hundred ninety-six million, six hundred forty thousand, four hundred sixty-eight".