190551890 has 16 divisors (see below), whose sum is σ = 345100608. Its totient is φ = 75752496.

The previous prime is 190551863. The next prime is 190551923. The reversal of 190551890 is 98155091.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56822 + ... + 60081.

It is an arithmetic number, because the mean of its divisors is an integer number (21568788).

Almost surely, 2^190551890 is an apocalyptic number.

190551890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190551890 is a deficient number, since it is larger than the sum of its proper divisors (154548718).

190551890 is a wasteful number, since it uses less digits than its factorization.

190551890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117073.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 190551890 is about 13804.0533902184. The cubic root of 190551890 is about 575.4457941756.

The spelling of 190551890 in words is "one hundred ninety million, five hundred fifty-one thousand, eight hundred ninety".