190009890 has 96 divisors (see below), whose sum is σ = 569986560. Its totient is φ = 43016832.

The previous prime is 190009889. The next prime is 190009921. The reversal of 190009890 is 98900091.

It is a super-2 number, since 2×190009890² = 72207516595624200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67287 + ... + 70053.

It is an arithmetic number, because the mean of its divisors is an integer number (5937360).

Almost surely, 2^190009890 is an apocalyptic number.

190009890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190009890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284993280).

190009890 is an abundant number, since it is smaller than the sum of its proper divisors (379976670).

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

190009890 is a wasteful number, since it uses less digits than its factorization.

190009890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896 (or 2893 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 190009890 is about 13784.4074954276. The cubic root of 190009890 is about 574.8996825621.

The spelling of 190009890 in words is "one hundred ninety million, nine thousand, eight hundred ninety".