2005906578 has 32 divisors (see below), whose sum is σ = 4344580800. Its totient is φ = 613749696.

The previous prime is 2005906537. The next prime is 2005906579. The reversal of 2005906578 is 8756095002.

It is a super-2 number, since 2×2005906578² = 8047322399327340168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2005906579) 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, 57873 + ... + 85796.

It is an arithmetic number, because the mean of its divisors is an integer number (135768150).

Almost surely, 2^2005906578 is an apocalyptic number.

2005906578 is an abundant number, since it is smaller than the sum of its proper divisors (2338674222).

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

2005906578 is a wasteful number, since it uses less digits than its factorization.

2005906578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143866.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 2005906578 is about 44787.3484144797. The cubic root of 2005906578 is about 1261.1601345617.

The spelling of 2005906578 in words is "two billion, five million, nine hundred six thousand, five hundred seventy-eight".