198537540 has 24 divisors (see below), whose sum is σ = 555905280. Its totient is φ = 52943328.

The previous prime is 198537533. The next prime is 198537557. The reversal of 198537540 is 45735891.

198537540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 198537492 and 198537501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654420 + ... + 1654539.

It is an arithmetic number, because the mean of its divisors is an integer number (23162720).

Almost surely, 2^198537540 is an apocalyptic number.

198537540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198537540 is an abundant number, since it is smaller than the sum of its proper divisors (357367740).

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

198537540 is a wasteful number, since it uses less digits than its factorization.

198537540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308971 (or 3308969 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 198537540 is about 14090.3349853721. The cubic root of 198537540 is about 583.3746394333.

The spelling of 198537540 in words is "one hundred ninety-eight million, five hundred thirty-seven thousand, five hundred forty".