198021802 has 16 divisors (see below), whose sum is σ = 335210400. Its totient is φ = 86905840.

The previous prime is 198021787. The next prime is 198021809. The reversal of 198021802 is 208120891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (198021809) 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, 154552 + ... + 155827.

It is an arithmetic number, because the mean of its divisors is an integer number (20950650).

Almost surely, 2^198021802 is an apocalyptic number.

198021802 is a deficient number, since it is larger than the sum of its proper divisors (137188598).

198021802 is a wasteful number, since it uses less digits than its factorization.

198021802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310421.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 198021802 is about 14072.0219584820. The cubic root of 198021802 is about 582.8690602081.

The spelling of 198021802 in words is "one hundred ninety-eight million, twenty-one thousand, eight hundred two".