198878926 has 8 divisors (see below), whose sum is σ = 308605320. Its totient is φ = 96010488.

The previous prime is 198878921. The next prime is 198878957. The reversal of 198878926 is 629878891.

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

It is a Harshad number since it is a multiple of its sum of digits (58), and also a Moran number because the ratio is a prime number: 3428947 = 198878926 / (1 + 9 + 8 + 8 + 7 + 8 + 9 + 2 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198878921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1714416 + ... + 1714531.

It is an arithmetic number, because the mean of its divisors is an integer number (38575665).

Almost surely, 2^198878926 is an apocalyptic number.

198878926 is a deficient number, since it is larger than the sum of its proper divisors (109726394).

198878926 is a wasteful number, since it uses less digits than its factorization.

198878926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428978.

The product of its digits is 3483648, while the sum is 58.

The square root of 198878926 is about 14102.4439725886. The cubic root of 198878926 is about 583.7088195482.

The spelling of 198878926 in words is "one hundred ninety-eight million, eight hundred seventy-eight thousand, nine hundred twenty-six".