199479890 has 16 divisors (see below), whose sum is σ = 360104832. Its totient is φ = 79560624.

The previous prime is 199479877. The next prime is 199479901. The reversal of 199479890 is 98974991.

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, 25274 + ... + 32213.

It is an arithmetic number, because the mean of its divisors is an integer number (22506552).

Almost surely, 2^199479890 is an apocalyptic number.

199479890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199479890 is a deficient number, since it is larger than the sum of its proper divisors (160624942).

199479890 is a wasteful number, since it uses less digits than its factorization.

199479890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57841.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 199479890 is about 14123.7349876015. The cubic root of 199479890 is about 584.2961706130.

The spelling of 199479890 in words is "one hundred ninety-nine million, four hundred seventy-nine thousand, eight hundred ninety".