190778285 has 16 divisors (see below), whose sum is σ = 232727040. Its totient is φ = 150109440.

The previous prime is 190778281. The next prime is 190778363. The reversal of 190778285 is 582877091.

It is not a de Polignac number, because 190778285 - 2² = 190778281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190778281) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 122069 + ... + 123621.

It is an arithmetic number, because the mean of its divisors is an integer number (14545440).

Almost surely, 2^190778285 is an apocalyptic number.

It is an amenable number.

190778285 is a deficient number, since it is larger than the sum of its proper divisors (41948755).

190778285 is a wasteful number, since it uses less digits than its factorization.

190778285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 190778285 is about 13812.2512647287. The cubic root of 190778285 is about 575.6735999981.

The spelling of 190778285 in words is "one hundred ninety million, seven hundred seventy-eight thousand, two hundred eighty-five".