197408740 has 36 divisors (see below), whose sum is σ = 418800564. Its totient is φ = 78163456.

The previous prime is 197408737. The next prime is 197408741. The reversal of 197408740 is 47804791.

It can be written as a sum of positive squares in 6 ways, for example, as 137686756 + 59721984 = 11734^2 + 7728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197408693 and 197408702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197408741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254994 + ... + 255766.

It is an arithmetic number, because the mean of its divisors is an integer number (11633349).

Almost surely, 2^197408740 is an apocalyptic number.

197408740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197408740 is an abundant number, since it is smaller than the sum of its proper divisors (221391824).

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

197408740 is a wasteful number, since it uses less digits than its factorization.

197408740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 197408740 is about 14050.2220623021. Note that the first 3 decimals coincide. The cubic root of 197408740 is about 582.2669307705.

The spelling of 197408740 in words is "one hundred ninety-seven million, four hundred eight thousand, seven hundred forty".