197765880 has 128 divisors (see below), whose sum is σ = 642539520. Its totient is φ = 48407040.

The previous prime is 197765873. The next prime is 197765899. The reversal of 197765880 is 88567791.

It is a super-2 number, since 2×197765880² = 78222686584348800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516169 + ... + 516551.

It is an arithmetic number, because the mean of its divisors is an integer number (5019840).

Almost surely, 2^197765880 is an apocalyptic number.

197765880 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 197765880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321269760).

197765880 is an abundant number, since it is smaller than the sum of its proper divisors (444773640).

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

197765880 is a wasteful number, since it uses less digits than its factorization.

197765880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 197765880 is about 14062.9257268891. The cubic root of 197765880 is about 582.6178533175.

The spelling of 197765880 in words is "one hundred ninety-seven million, seven hundred sixty-five thousand, eight hundred eighty".