78266418 has 16 divisors (see below), whose sum is σ = 161930880. Its totient is φ = 25189136.

The previous prime is 78266381. The next prime is 78266429. The reversal of 78266418 is 81466287.

It is a super-2 number, since 2×78266418² = 12251264373101448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78266418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224730 + ... + 225077.

It is an arithmetic number, because the mean of its divisors is an integer number (10120680).

Almost surely, 2^78266418 is an apocalyptic number.

78266418 is an abundant number, since it is smaller than the sum of its proper divisors (83664462).

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

78266418 is a wasteful number, since it uses less digits than its factorization.

78266418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449841.

The product of its digits is 129024, while the sum is 42.

The square root of 78266418 is about 8846.8309580324. The cubic root of 78266418 is about 427.7517739907.

The spelling of 78266418 in words is "seventy-eight million, two hundred sixty-six thousand, four hundred eighteen".