190789930 has 16 divisors (see below), whose sum is σ = 349902504. Its totient is φ = 74875840.

The previous prime is 190789919. The next prime is 190789939. The reversal of 190789930 is 39987091.

It can be written as a sum of positive squares in 4 ways, for example, as 187115041 + 3674889 = 13679^2 + 1917^2 .

It is not an unprimeable number, because it can be changed into a prime (190789939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179461 + ... + 180520.

Almost surely, 2^190789930 is an apocalyptic number.

190789930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190789930 is a deficient number, since it is larger than the sum of its proper divisors (159112574).

190789930 is a wasteful number, since it uses less digits than its factorization.

190789930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360041.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 190789930 is about 13812.6728043489. The cubic root of 190789930 is about 575.6853126915.

The spelling of 190789930 in words is "one hundred ninety million, seven hundred eighty-nine thousand, nine hundred thirty".