199228788 has 96 divisors (see below), whose sum is σ = 572113920. Its totient is φ = 59447520.

The previous prime is 199228787. The next prime is 199228789. The reversal of 199228788 is 887822991.

It is an interprime number because it is at equal distance from previous prime (199228787) and next prime (199228789).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199228787) 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, 78345 + ... + 80847.

It is an arithmetic number, because the mean of its divisors is an integer number (5959520).

Almost surely, 2^199228788 is an apocalyptic number.

199228788 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 199228788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286056960).

199228788 is an abundant number, since it is smaller than the sum of its proper divisors (372885132).

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

199228788 is a wasteful number, since it uses less digits than its factorization.

199228788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2586 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 199228788 is about 14114.8428259049. The cubic root of 199228788 is about 584.0509002048.

The spelling of 199228788 in words is "one hundred ninety-nine million, two hundred twenty-eight thousand, seven hundred eighty-eight".