198471840 has 96 divisors (see below), whose sum is σ = 714510720. Its totient is φ = 45364224.

The previous prime is 198471829. The next prime is 198471851. The reversal of 198471840 is 48174891.

It is an interprime number because it is at equal distance from previous prime (198471829) and next prime (198471851).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 198471792 and 198471801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26175 + ... + 32894.

It is an arithmetic number, because the mean of its divisors is an integer number (7442820).

Almost surely, 2^198471840 is an apocalyptic number.

198471840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198471840 is an abundant number, since it is smaller than the sum of its proper divisors (516038880).

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

198471840 is a wasteful number, since it uses less digits than its factorization.

198471840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59094 (or 59086 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 198471840 is about 14088.0034071546. The cubic root of 198471840 is about 583.3102822637.

The spelling of 198471840 in words is "one hundred ninety-eight million, four hundred seventy-one thousand, eight hundred forty".