198693790 has 64 divisors (see below), whose sum is σ = 401708160. Its totient is φ = 70389760.

The previous prime is 198693763. The next prime is 198693797. The reversal of 198693790 is 97396891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198693797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201639 + ... + 202621.

It is an arithmetic number, because the mean of its divisors is an integer number (6276690).

Almost surely, 2^198693790 is an apocalyptic number.

198693790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198693790 is an abundant number, since it is smaller than the sum of its proper divisors (203014370).

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

198693790 is a wasteful number, since it uses less digits than its factorization.

198693790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 198693790 is about 14095.8784756396. The cubic root of 198693790 is about 583.5276388533.

The spelling of 198693790 in words is "one hundred ninety-eight million, six hundred ninety-three thousand, seven hundred ninety".