2091690384 has 80 divisors (see below), whose sum is σ = 6187794432. Its totient is φ = 596433024.

The previous prime is 2091690343. The next prime is 2091690407. The reversal of 2091690384 is 4830961902.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169777 + ... + 181679.

Almost surely, 2^2091690384 is an apocalyptic number.

2091690384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091690384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3093897216).

2091690384 is an abundant number, since it is smaller than the sum of its proper divisors (4096104048).

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

2091690384 is a wasteful number, since it uses less digits than its factorization.

2091690384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444 (or 12438 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 2091690384 is about 45735.0017382748. The cubic root of 2091690384 is about 1278.8878653761.

The spelling of 2091690384 in words is "two billion, ninety-one million, six hundred ninety thousand, three hundred eighty-four".