99198378 has 16 divisors (see below), whose sum is σ = 220440960. Its totient is φ = 33066108.

The previous prime is 99198371. The next prime is 99198397. The reversal of 99198378 is 87389199.

It is a super-3 number, since 3×99198378³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1837007 = 99198378 / (9 + 9 + 1 + 9 + 8 + 3 + 7 + 8).

It is not an unprimeable number, because it can be changed into a prime (99198371) 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, 918450 + ... + 918557.

It is an arithmetic number, because the mean of its divisors is an integer number (13777560).

Almost surely, 2^99198378 is an apocalyptic number.

99198378 is an abundant number, since it is smaller than the sum of its proper divisors (121242582).

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

99198378 is a wasteful number, since it uses less digits than its factorization.

99198378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837018 (or 1837012 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 99198378 is about 9959.8382516987. The cubic root of 99198378 is about 462.9152878649.

The spelling of 99198378 in words is "ninety-nine million, one hundred ninety-eight thousand, three hundred seventy-eight".