197420256 has 144 divisors (see below), whose sum is σ = 619517808. Its totient is φ = 59136000.

The previous prime is 197420239. The next prime is 197420263. The reversal of 197420256 is 652024791.

197420256 is digitally balanced in base 3, 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 (144).

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

It is a self number, because there is not a number n which added to its sum of digits gives 197420256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319660 + ... + 320276.

It is an arithmetic number, because the mean of its divisors is an integer number (4302207).

Almost surely, 2^197420256 is an apocalyptic number.

197420256 is a gapful number since it is divisible by the number (16) 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 197420256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309758904).

197420256 is an abundant number, since it is smaller than the sum of its proper divisors (422097552).

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

197420256 is a wasteful number, since it uses less digits than its factorization.

197420256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 197420256 is about 14050.6318719124. The cubic root of 197420256 is about 582.2782528893.

The spelling of 197420256 in words is "one hundred ninety-seven million, four hundred twenty thousand, two hundred fifty-six".