78225018 has 8 divisors (see below), whose sum is σ = 156450048. Its totient is φ = 26075004.

The previous prime is 78225013. The next prime is 78225019. The reversal of 78225018 is 81052287.

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

78225018 is an admirable number.

It is a super-2 number, since 2×78225018² = 12238306882200648, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78225018.

It is not an unprimeable number, because it can be changed into a prime (78225013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6518746 + ... + 6518757.

It is an arithmetic number, because the mean of its divisors is an integer number (19556256).

Almost surely, 2^78225018 is an apocalyptic number.

78225018 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.

78225018 is a wasteful number, since it uses less digits than its factorization.

78225018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13037508.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 78225018 is about 8844.4908276282. The cubic root of 78225018 is about 427.6763391394.

The spelling of 78225018 in words is "seventy-eight million, two hundred twenty-five thousand, eighteen".