197898840 has 48 divisors (see below), whose sum is σ = 643172400. Its totient is φ = 52772928.

The previous prime is 197898817. The next prime is 197898859. The reversal of 197898840 is 48898791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274500 + ... + 275219.

It is an arithmetic number, because the mean of its divisors is an integer number (13399425).

Almost surely, 2^197898840 is an apocalyptic number.

197898840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197898840 is an abundant number, since it is smaller than the sum of its proper divisors (445273560).

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

197898840 is a wasteful number, since it uses less digits than its factorization.

197898840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549736 (or 549729 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 197898840 is about 14067.6522561513. The cubic root of 197898840 is about 582.7483906918.

The spelling of 197898840 in words is "one hundred ninety-seven million, eight hundred ninety-eight thousand, eight hundred forty".