198065620 has 12 divisors (see below), whose sum is σ = 415937844. Its totient is φ = 79226240.

The previous prime is 198065599. The next prime is 198065641. The reversal of 198065620 is 26560891.

It is an interprime number because it is at equal distance from previous prime (198065599) and next prime (198065641).

It can be written as a sum of positive squares in 2 ways, for example, as 147428164 + 50637456 = 12142^2 + 7116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198065620.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4951621 + ... + 4951660.

It is an arithmetic number, because the mean of its divisors is an integer number (34661487).

Almost surely, 2^198065620 is an apocalyptic number.

198065620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198065620 is an abundant number, since it is smaller than the sum of its proper divisors (217872224).

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

198065620 is a wasteful number, since it uses less digits than its factorization.

198065620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9903290 (or 9903288 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 198065620 is about 14073.5787914802. The cubic root of 198065620 is about 582.9120491999.

It can be divided in two parts, 1980 and 65620, that added together give a square (67600 = 260²).

The spelling of 198065620 in words is "one hundred ninety-eight million, sixty-five thousand, six hundred twenty".