197973440 has 112 divisors (see below), whose sum is σ = 556345344. Its totient is φ = 65664000.

The previous prime is 197973437. The next prime is 197973511. The reversal of 197973440 is 44379791.

It is a happy number.

197973440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 197973391 and 197973400.

It is a congruent number.

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, 68015 + ... + 70865.

Almost surely, 2^197973440 is an apocalyptic number.

197973440 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 197973440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278172672).

197973440 is an abundant number, since it is smaller than the sum of its proper divisors (358371904).

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

197973440 is a wasteful number, since it uses less digits than its factorization.

197973440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2896 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 197973440 is about 14070.3034793142. The cubic root of 197973440 is about 582.8216058229.

The spelling of 197973440 in words is "one hundred ninety-seven million, nine hundred seventy-three thousand, four hundred forty".