190561830 has 32 divisors (see below), whose sum is σ = 481420800. Its totient is φ = 48141792.

The previous prime is 190561817. The next prime is 190561841. The reversal of 190561830 is 38165091.

It is a super-2 number, since 2×190561830² = 72627622105897800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 190561791 and 190561800.

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 15 ways as a sum of consecutive naturals, for example, 166590 + ... + 167729.

It is an arithmetic number, because the mean of its divisors is an integer number (15044400).

Almost surely, 2^190561830 is an apocalyptic number.

190561830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190561830 is an abundant number, since it is smaller than the sum of its proper divisors (290858970).

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

190561830 is a wasteful number, since it uses less digits than its factorization.

190561830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334348.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 190561830 is about 13804.4134246986. The cubic root of 190561830 is about 575.4557999047.

The spelling of 190561830 in words is "one hundred ninety million, five hundred sixty-one thousand, eight hundred thirty".