198157845 has 8 divisors (see below), whose sum is σ = 317052576. Its totient is φ = 105684176.

The previous prime is 198157837. The next prime is 198157847. The reversal of 198157845 is 548751891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198157845 - 2³ = 198157837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198157794 and 198157803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198157847) 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, 6605247 + ... + 6605276.

It is an arithmetic number, because the mean of its divisors is an integer number (39631572).

Almost surely, 2^198157845 is an apocalyptic number.

198157845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198157845 is a deficient number, since it is larger than the sum of its proper divisors (118894731).

198157845 is a wasteful number, since it uses less digits than its factorization.

198157845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13210531.

The product of its digits is 403200, while the sum is 48.

The square root of 198157845 is about 14076.8549399360. The cubic root of 198157845 is about 583.0025086513.

The spelling of 198157845 in words is "one hundred ninety-eight million, one hundred fifty-seven thousand, eight hundred forty-five".