199690920 has 320 divisors, whose sum is σ = 790352640. Its totient is φ = 44582400.

The previous prime is 199690919. The next prime is 199690937. The reversal of 199690920 is 29096991.

It is a happy number.

199690920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 463105 + ... + 463535.

It is an arithmetic number, because the mean of its divisors is an integer number (2469852).

Almost surely, 2^199690920 is an apocalyptic number.

199690920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199690920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395176320).

199690920 is an abundant number, since it is smaller than the sum of its proper divisors (590661720).

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

199690920 is a wasteful number, since it uses less digits than its factorization.

199690920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 199690920 is about 14131.2037703799. The cubic root of 199690920 is about 584.5021405235.

The spelling of 199690920 in words is "one hundred ninety-nine million, six hundred ninety thousand, nine hundred twenty".