2006428656 has 20 divisors (see below), whose sum is σ = 5183274152. Its totient is φ = 668809536.

The previous prime is 2006428651. The next prime is 2006428663. The reversal of 2006428656 is 6568246002.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006428651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20900251 + ... + 20900346.

Almost surely, 2^2006428656 is an apocalyptic number.

It is an amenable number.

2006428656 is an abundant number, since it is smaller than the sum of its proper divisors (3176845496).

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

2006428656 is a wasteful number, since it uses less digits than its factorization.

2006428656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41800608 (or 41800602 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 2006428656 is about 44793.1764446327. The cubic root of 2006428656 is about 1261.2695392657.

The spelling of 2006428656 in words is "two billion, six million, four hundred twenty-eight thousand, six hundred fifty-six".