197640268 has 12 divisors (see below), whose sum is σ = 395280592. Its totient is φ = 84702960.

The previous prime is 197640259. The next prime is 197640281. The reversal of 197640268 is 862046791.

197640268 is an admirable number.

It is a super-2 number, since 2×197640268² = 78123351070223648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3529263 + ... + 3529318.

Almost surely, 2^197640268 is an apocalyptic number.

It is an amenable number.

197640268 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

197640268 is a wasteful number, since it uses less digits than its factorization.

197640268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7058592 (or 7058590 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 197640268 is about 14058.4589482631. The cubic root of 197640268 is about 582.4944762995.

The spelling of 197640268 in words is "one hundred ninety-seven million, six hundred forty thousand, two hundred sixty-eight".