197457780 has 96 divisors (see below), whose sum is σ = 599760000. Its totient is φ = 48250368.

The previous prime is 197457749. The next prime is 197457797. The reversal of 197457780 is 87754791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115371 + ... + 117069.

It is an arithmetic number, because the mean of its divisors is an integer number (6247500).

Almost surely, 2^197457780 is an apocalyptic number.

197457780 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 197457780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299880000).

197457780 is an abundant number, since it is smaller than the sum of its proper divisors (402302220).

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

197457780 is a wasteful number, since it uses less digits than its factorization.

197457780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873 (or 1871 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 48.

The square root of 197457780 is about 14051.9671220794. The cubic root of 197457780 is about 582.3151420877.

The spelling of 197457780 in words is "one hundred ninety-seven million, four hundred fifty-seven thousand, seven hundred eighty".