1996207605 has 128 divisors (see below), whose sum is σ = 4379443200. Its totient is φ = 842510592.

The previous prime is 1996207601. The next prime is 1996207607. The reversal of 1996207605 is 5067026991.

It is a happy number.

1996207605 is a `hidden beast` number, since 19 + 9 + 6 + 20 + 7 + 605 = 666.

It is not a de Polignac number, because 1996207605 - 2² = 1996207601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996207601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 628732 + ... + 631898.

It is an arithmetic number, because the mean of its divisors is an integer number (34214400).

Almost surely, 2^1996207605 is an apocalyptic number.

1996207605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1996207605 is an abundant number, since it is smaller than the sum of its proper divisors (2383235595).

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

1996207605 is a wasteful number, since it uses less digits than its factorization.

1996207605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240 (or 3234 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 1996207605 is about 44678.9391660097. The cubic root of 1996207605 is about 1259.1241929681.

The spelling of 1996207605 in words is "one billion, nine hundred ninety-six million, two hundred seven thousand, six hundred five".