197974840 has 32 divisors (see below), whose sum is σ = 509078880. Its totient is φ = 67876992.

The previous prime is 197974831. The next prime is 197974841. The reversal of 197974840 is 48479791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197974841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353247 + ... + 353806.

It is an arithmetic number, because the mean of its divisors is an integer number (15908715).

Almost surely, 2^197974840 is an apocalyptic number.

197974840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197974840 is an abundant number, since it is smaller than the sum of its proper divisors (311104040).

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

197974840 is a wasteful number, since it uses less digits than its factorization.

197974840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707071 (or 707067 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 197974840 is about 14070.3532293969. The cubic root of 197974840 is about 582.8229796576.

The spelling of 197974840 in words is "one hundred ninety-seven million, nine hundred seventy-four thousand, eight hundred forty".