2117796990 has 32 divisors (see below), whose sum is σ = 5303702016. Its totient is φ = 540191520.

The previous prime is 2117796983. The next prime is 2117796991. The reversal of 2117796990 is 996977112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117796991) 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, 1533946 + ... + 1535325.

It is an arithmetic number, because the mean of its divisors is an integer number (165740688).

Almost surely, 2^2117796990 is an apocalyptic number.

2117796990 is an abundant number, since it is smaller than the sum of its proper divisors (3185905026).

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

2117796990 is a wasteful number, since it uses less digits than its factorization.

2117796990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069304.

The product of its (nonzero) digits is 428652, while the sum is 51.

The square root of 2117796990 is about 46019.5283548191. The cubic root of 2117796990 is about 1284.1865260703.

The spelling of 2117796990 in words is "two billion, one hundred seventeen million, seven hundred ninety-six thousand, nine hundred ninety".