197775740 has 12 divisors (see below), whose sum is σ = 415329096. Its totient is φ = 79110288.

The previous prime is 197775719. The next prime is 197775749. The reversal of 197775740 is 47577791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197775749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4944374 + ... + 4944413.

It is an arithmetic number, because the mean of its divisors is an integer number (34610758).

Almost surely, 2^197775740 is an apocalyptic number.

197775740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197775740 is an abundant number, since it is smaller than the sum of its proper divisors (217553356).

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

197775740 is a wasteful number, since it uses less digits than its factorization.

197775740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9888796 (or 9888794 counting only the distinct ones).

The product of its (nonzero) digits is 432180, while the sum is 47.

The square root of 197775740 is about 14063.2762896844. The cubic root of 197775740 is about 582.6275356695.

The spelling of 197775740 in words is "one hundred ninety-seven million, seven hundred seventy-five thousand, seven hundred forty".