199290720 has 48 divisors (see below), whose sum is σ = 627767280. Its totient is φ = 53144064.

The previous prime is 199290659. The next prime is 199290727. The reversal of 199290720 is 27092991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199290727) 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, 207115 + ... + 208074.

It is an arithmetic number, because the mean of its divisors is an integer number (13078485).

Almost surely, 2^199290720 is an apocalyptic number.

199290720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199290720 is an abundant number, since it is smaller than the sum of its proper divisors (428476560).

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

199290720 is a wasteful number, since it uses less digits than its factorization.

199290720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415207 (or 415199 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 199290720 is about 14117.0365162098. The cubic root of 199290720 is about 584.1114130341. Note that the first 3 decimals are identical.

The spelling of 199290720 in words is "one hundred ninety-nine million, two hundred ninety thousand, seven hundred twenty".