197280144 has 80 divisors (see below), whose sum is σ = 568465600. Its totient is φ = 65505024.

The previous prime is 197280113. The next prime is 197280157. The reversal of 197280144 is 441082791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 197280099 and 197280108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134487 + ... + 135945.

It is an arithmetic number, because the mean of its divisors is an integer number (7105820).

Almost surely, 2^197280144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197280144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284232800).

197280144 is an abundant number, since it is smaller than the sum of its proper divisors (371185456).

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

197280144 is a wasteful number, since it uses less digits than its factorization.

197280144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 197280144 is about 14045.6450190086. The cubic root of 197280144 is about 582.1404698668.

The spelling of 197280144 in words is "one hundred ninety-seven million, two hundred eighty thousand, one hundred forty-four".