4006693444 has 48 divisors (see below), whose sum is σ = 7788239536. Its totient is φ = 1791590400.

The previous prime is 4006693441. The next prime is 4006693451. The reversal of 4006693444 is 4443966004.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 83174400 + 3923519044 = 9120^2 + 62638^2 .

It is a super-2 number, since 2×4006693444² = 32107184708385162272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4006693397 and 4006693406.

It is not an unprimeable number, because it can be changed into a prime (4006693441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459364 + ... + 468004.

Almost surely, 2^4006693444 is an apocalyptic number.

It is an amenable number.

4006693444 is a deficient number, since it is larger than the sum of its proper divisors (3781546092).

4006693444 is a wasteful number, since it uses less digits than its factorization.

4006693444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936 (or 8934 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 4006693444 is about 63298.4474059198. The cubic root of 4006693444 is about 1588.2859902151.

The spelling of 4006693444 in words is "four billion, six million, six hundred ninety-three thousand, four hundred forty-four".