2005678126 has 4 divisors (see below), whose sum is σ = 3008517192. Its totient is φ = 1002839062.

The previous prime is 2005678117. The next prime is 2005678127. The reversal of 2005678126 is 6218765002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2005678126² = 8045489490229743752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005678127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501419530 + ... + 501419533.

It is an arithmetic number, because the mean of its divisors is an integer number (752129298).

Almost surely, 2^2005678126 is an apocalyptic number.

2005678126 is a deficient number, since it is larger than the sum of its proper divisors (1002839066).

2005678126 is a wasteful number, since it uses less digits than its factorization.

2005678126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002839065.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 2005678126 is about 44784.7979341205. The cubic root of 2005678126 is about 1261.1122550482.

The spelling of 2005678126 in words is "two billion, five million, six hundred seventy-eight thousand, one hundred twenty-six".