4001636406 has 16 divisors (see below), whose sum is σ = 8032808448. Its totient is φ = 1328956200.

The previous prime is 4001636399. The next prime is 4001636411. The reversal of 4001636406 is 6046361004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228890 + ... + 1232141.

It is an arithmetic number, because the mean of its divisors is an integer number (502050528).

Almost surely, 2^4001636406 is an apocalyptic number.

4001636406 is an abundant number, since it is smaller than the sum of its proper divisors (4031172042).

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

4001636406 is a wasteful number, since it uses less digits than its factorization.

4001636406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461307.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 4001636406 is about 63258.4888058512. The cubic root of 4001636406 is about 1587.6174918394.

The spelling of 4001636406 in words is "four billion, one million, six hundred thirty-six thousand, four hundred six".