198740736 has 72 divisors (see below), whose sum is σ = 587731760. Its totient is φ = 66244608.

The previous prime is 198740719. The next prime is 198740743. The reversal of 198740736 is 637047891.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 198740691 and 198740700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7465 + ... + 21288.

Almost surely, 2^198740736 is an apocalyptic number.

198740736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198740736 is an abundant number, since it is smaller than the sum of its proper divisors (388991024).

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

198740736 is an equidigital number, since it uses as much as digits as its factorization.

198740736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28778 (or 28758 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 198740736 is about 14097.5436158219. The cubic root of 198740736 is about 583.5735925313.

The spelling of 198740736 in words is "one hundred ninety-eight million, seven hundred forty thousand, seven hundred thirty-six".