199026820 has 96 divisors (see below), whose sum is σ = 477259776. Its totient is φ = 69273600.

The previous prime is 199026809. The next prime is 199026823. The reversal of 199026820 is 28620991.

199026820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199026820² = 79223350158624800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 199026820.

It is not an unprimeable number, because it can be changed into a prime (199026823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242010 + ... + 242830.

It is an arithmetic number, because the mean of its divisors is an integer number (4971456).

Almost surely, 2^199026820 is an apocalyptic number.

199026820 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 199026820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238629888).

199026820 is an abundant number, since it is smaller than the sum of its proper divisors (278232956).

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

199026820 is a wasteful number, since it uses less digits than its factorization.

199026820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 199026820 is about 14107.6865573346. The cubic root of 199026820 is about 583.8534731222.

The spelling of 199026820 in words is "one hundred ninety-nine million, twenty-six thousand, eight hundred twenty".