199990320 has 40 divisors (see below), whose sum is σ = 619970736. Its totient is φ = 53330688.

The previous prime is 199990309. The next prime is 199990321. The reversal of 199990320 is 23099991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×199990320² = 79992256187404800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199990321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416407 + ... + 416886.

Almost surely, 2^199990320 is an apocalyptic number.

199990320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199990320 is an abundant number, since it is smaller than the sum of its proper divisors (419980416).

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

199990320 is a wasteful number, since it uses less digits than its factorization.

199990320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833309 (or 833303 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 199990320 is about 14141.7933799077. The cubic root of 199990320 is about 584.7941126598.

The spelling of 199990320 in words is "one hundred ninety-nine million, nine hundred ninety thousand, three hundred twenty".