190779490 has 24 divisors (see below), whose sum is σ = 377461980. Its totient is φ = 69373920.

The previous prime is 190779469. The next prime is 190779497. The reversal of 190779490 is 94977091.

It can be written as a sum of positive squares in 2 ways, for example, as 180391761 + 10387729 = 13431^2 + 3223^2 .

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 190779490.

It is not an unprimeable number, because it can be changed into a prime (190779497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77625 + ... + 80044.

Almost surely, 2^190779490 is an apocalyptic number.

190779490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190779490 is a deficient number, since it is larger than the sum of its proper divisors (186682490).

190779490 is a wasteful number, since it uses less digits than its factorization.

190779490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157698 (or 157687 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 190779490 is about 13812.2948853549. The cubic root of 190779490 is about 575.6748120250.

The spelling of 190779490 in words is "one hundred ninety million, seven hundred seventy-nine thousand, four hundred ninety".