197765540 has 48 divisors (see below), whose sum is σ = 479563392. Its totient is φ = 67101696.

The previous prime is 197765531. The next prime is 197765563. The reversal of 197765540 is 45567791.

197765540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×197765540² = 78222417622983200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197765491 and 197765500.

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, 6299 + ... + 20861.

It is an arithmetic number, because the mean of its divisors is an integer number (9990904).

Almost surely, 2^197765540 is an apocalyptic number.

197765540 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 197765540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239781696).

197765540 is an abundant number, since it is smaller than the sum of its proper divisors (281797852).

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

197765540 is a wasteful number, since it uses less digits than its factorization.

197765540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676 (or 14674 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 197765540 is about 14062.9136383610. The cubic root of 197765540 is about 582.6175194376.

The spelling of 197765540 in words is "one hundred ninety-seven million, seven hundred sixty-five thousand, five hundred forty".