78898818 has 8 divisors (see below), whose sum is σ = 157797648. Its totient is φ = 26299604.

The previous prime is 78898817. The next prime is 78898829. The reversal of 78898818 is 81889887.

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

78898818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (78898817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6574896 + ... + 6574907.

It is an arithmetic number, because the mean of its divisors is an integer number (19724706).

Almost surely, 2^78898818 is an apocalyptic number.

78898818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78898818 is a wasteful number, since it uses less digits than its factorization.

78898818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13149808.

The product of its digits is 2064384, while the sum is 57.

The square root of 78898818 is about 8882.5006614129. The cubic root of 78898818 is about 428.9007763307.

The spelling of 78898818 in words is "seventy-eight million, eight hundred ninety-eight thousand, eight hundred eighteen".