198793040 has 40 divisors (see below), whose sum is σ = 464553600. Its totient is φ = 79111296.

The previous prime is 198793039. The next prime is 198793043. The reversal of 198793040 is 40397891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198793043) 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, 9677 + ... + 22163.

It is an arithmetic number, because the mean of its divisors is an integer number (11613840).

Almost surely, 2^198793040 is an apocalyptic number.

198793040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198793040 is an abundant number, since it is smaller than the sum of its proper divisors (265760560).

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

198793040 is a wasteful number, since it uses less digits than its factorization.

198793040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12699 (or 12693 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 198793040 is about 14099.3985687333. The cubic root of 198793040 is about 583.6247824325.

The spelling of 198793040 in words is "one hundred ninety-eight million, seven hundred ninety-three thousand, forty".