197285440 has 112 divisors (see below), whose sum is σ = 525377664. Its totient is φ = 69939200.

The previous prime is 197285437. The next prime is 197285449. The reversal of 197285440 is 44582791.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 197285393 and 197285402.

It is not an unprimeable number, because it can be changed into a prime (197285449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143637 + ... + 145003.

It is an arithmetic number, because the mean of its divisors is an integer number (4690872).

Almost surely, 2^197285440 is an apocalyptic number.

197285440 is a gapful number since it is divisible by the number (10) 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 197285440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262688832).

197285440 is an abundant number, since it is smaller than the sum of its proper divisors (328092224).

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

197285440 is a wasteful number, since it uses less digits than its factorization.

197285440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 197285440 is about 14045.8335459310. The cubic root of 197285440 is about 582.1456790215.

The spelling of 197285440 in words is "one hundred ninety-seven million, two hundred eighty-five thousand, four hundred forty".