198072270 has 128 divisors (see below), whose sum is σ = 610260480. Its totient is φ = 45181440.

The previous prime is 198072269. The next prime is 198072311. The reversal of 198072270 is 72270891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48529 + ... + 52451.

It is an arithmetic number, because the mean of its divisors is an integer number (4767660).

Almost surely, 2^198072270 is an apocalyptic number.

198072270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198072270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305130240).

198072270 is an abundant number, since it is smaller than the sum of its proper divisors (412188210).

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

198072270 is a wasteful number, since it uses less digits than its factorization.

198072270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967 (or 3961 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 198072270 is about 14073.8150478113. The cubic root of 198072270 is about 582.9185728321.

The spelling of 198072270 in words is "one hundred ninety-eight million, seventy-two thousand, two hundred seventy".