197351840 has 48 divisors (see below), whose sum is σ = 532852992. Its totient is φ = 67663104.

The previous prime is 197351831. The next prime is 197351851. The reversal of 197351840 is 48153791.

It is a junction number, because it is equal to n+sod(n) for n = 197351794 and 197351803.

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 7 ways as a sum of consecutive naturals, for example, 86984 + ... + 89223.

It is an arithmetic number, because the mean of its divisors is an integer number (11101104).

Almost surely, 2^197351840 is an apocalyptic number.

197351840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197351840 is an abundant number, since it is smaller than the sum of its proper divisors (335501152).

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

197351840 is a wasteful number, since it uses less digits than its factorization.

197351840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176229 (or 176221 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 197351840 is about 14048.1970373426. The cubic root of 197351840 is about 582.2109822648.

The spelling of 197351840 in words is "one hundred ninety-seven million, three hundred fifty-one thousand, eight hundred forty".