198037840 has 160 divisors (see below), whose sum is σ = 618460416. Its totient is φ = 56954880.

The previous prime is 198037823. The next prime is 198037877. The reversal of 198037840 is 48730891.

198037840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 198037793 and 198037802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78844 + ... + 81316.

Almost surely, 2^198037840 is an apocalyptic number.

198037840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198037840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309230208).

198037840 is an abundant number, since it is smaller than the sum of its proper divisors (420422576).

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

198037840 is a wasteful number, since it uses less digits than its factorization.

198037840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517 (or 2511 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 198037840 is about 14072.5918010863. The cubic root of 198037840 is about 582.8847955153.

The spelling of 198037840 in words is "one hundred ninety-eight million, thirty-seven thousand, eight hundred forty".