4006220646 has 64 divisors (see below), whose sum is σ = 8811272448. Its totient is φ = 1209212928.

The previous prime is 4006220641. The next prime is 4006220671. The reversal of 4006220646 is 6460226004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006220641) 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 31 ways as a sum of consecutive naturals, for example, 287046 + ... + 300678.

It is an arithmetic number, because the mean of its divisors is an integer number (137676132).

Almost surely, 2^4006220646 is an apocalyptic number.

4006220646 is an abundant number, since it is smaller than the sum of its proper divisors (4805051802).

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

4006220646 is a wasteful number, since it uses less digits than its factorization.

4006220646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13765.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 4006220646 is about 63294.7126227776. The cubic root of 4006220646 is about 1588.2235140953.

The spelling of 4006220646 in words is "four billion, six million, two hundred twenty thousand, six hundred forty-six".