190661000 has 64 divisors (see below), whose sum is σ = 458293680. Its totient is φ = 74188800.

The previous prime is 190660979. The next prime is 190661017. The reversal of 190661000 is 166091.

It can be written as a sum of positive squares in 8 ways, for example, as 39715204 + 150945796 = 6302^2 + 12286^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34424 + ... + 39576.

Almost surely, 2^190661000 is an apocalyptic number.

190661000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190661000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229146840).

190661000 is an abundant number, since it is smaller than the sum of its proper divisors (267632680).

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

190661000 is a wasteful number, since it uses less digits than its factorization.

190661000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211 (or 5197 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 190661000 is about 13808.0049246805. The cubic root of 190661000 is about 575.5556066270. Note that the first 3 decimals are identical.

The spelling of 190661000 in words is "one hundred ninety million, six hundred sixty-one thousand".