190806784 has 144 divisors (see below), whose sum is σ = 463579200. Its totient is φ = 78274560.

The previous prime is 190806773. The next prime is 190806799. The reversal of 190806784 is 487608091.

It is a self number, because there is not a number n which added to its sum of digits gives 190806784.

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, 3600102 + ... + 3600154.

It is an arithmetic number, because the mean of its divisors is an integer number (3219300).

Almost surely, 2^190806784 is an apocalyptic number.

190806784 is a gapful number since it is divisible by the number (14) 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 190806784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231789600).

190806784 is an abundant number, since it is smaller than the sum of its proper divisors (272772416).

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

190806784 is an frugal number, since it uses more digits than its factorization.

190806784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 190806784 is about 13813.2828827908. The cubic root of 190806784 is about 575.7022638212.

The spelling of 190806784 in words is "one hundred ninety million, eight hundred six thousand, seven hundred eighty-four".