78812198 has 8 divisors (see below), whose sum is σ = 122294880. Its totient is φ = 38047240.

The previous prime is 78812197. The next prime is 78812203. The reversal of 78812198 is 89121887.

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

It is a super-2 number, since 2×78812198² = 12422725107182408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78812197) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 679358 + ... + 679473.

It is an arithmetic number, because the mean of its divisors is an integer number (15286860).

Almost surely, 2^78812198 is an apocalyptic number.

78812198 is a deficient number, since it is larger than the sum of its proper divisors (43482682).

78812198 is a wasteful number, since it uses less digits than its factorization.

78812198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358862.

The product of its digits is 64512, while the sum is 44.

The square root of 78812198 is about 8877.6234432420. The cubic root of 78812198 is about 428.7437609272.

The spelling of 78812198 in words is "seventy-eight million, eight hundred twelve thousand, one hundred ninety-eight".