190505790 has 64 divisors (see below), whose sum is σ = 515646720. Its totient is φ = 50038560.

The previous prime is 190505779. The next prime is 190505807. The reversal of 190505790 is 97505091.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12825 + ... + 23355.

It is an arithmetic number, because the mean of its divisors is an integer number (8056980).

Almost surely, 2^190505790 is an apocalyptic number.

190505790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190505790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257823360).

190505790 is an abundant number, since it is smaller than the sum of its proper divisors (325140930).

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

190505790 is a wasteful number, since it uses less digits than its factorization.

190505790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10614 (or 10608 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 190505790 is about 13802.3834898180. The cubic root of 190505790 is about 575.3993847860.

The spelling of 190505790 in words is "one hundred ninety million, five hundred five thousand, seven hundred ninety".