199089828 has 144 divisors (see below), whose sum is σ = 620139520. Its totient is φ = 52581312.

The previous prime is 199089823. The next prime is 199089883. The reversal of 199089828 is 828980991.

It is a happy number.

It is a super-2 number, since 2×199089828² = 79273519226139168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199089823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 205401 + ... + 206367.

Almost surely, 2^199089828 is an apocalyptic number.

199089828 is a gapful number since it is divisible by the number (18) 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 199089828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310069760).

199089828 is an abundant number, since it is smaller than the sum of its proper divisors (421049692).

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

199089828 is a wasteful number, since it uses less digits than its factorization.

199089828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 199089828 is about 14109.9194894939. The cubic root of 199089828 is about 583.9150788198.

The spelling of 199089828 in words is "one hundred ninety-nine million, eighty-nine thousand, eight hundred twenty-eight".