198783730 has 8 divisors (see below), whose sum is σ = 357810732. Its totient is φ = 79513488.

The previous prime is 198783713. The next prime is 198783743. The reversal of 198783730 is 37387891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 160554241 + 38229489 = 12671^2 + 6183^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9939177 + ... + 9939196.

Almost surely, 2^198783730 is an apocalyptic number.

198783730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198783730 is a deficient number, since it is larger than the sum of its proper divisors (159027002).

198783730 is a wasteful number, since it uses less digits than its factorization.

198783730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19878380.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 198783730 is about 14099.0684089411. The cubic root of 198783730 is about 583.6156713966.

The spelling of 198783730 in words is "one hundred ninety-eight million, seven hundred eighty-three thousand, seven hundred thirty".