78264618 has 8 divisors (see below), whose sum is σ = 156529248. Its totient is φ = 26088204.

The previous prime is 78264611. The next prime is 78264631. The reversal of 78264618 is 81646287.

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

78264618 is an admirable number.

It is a super-2 number, since 2×78264618² = 12250700861371848, 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 78264618.

It is not an unprimeable number, because it can be changed into a prime (78264611) 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, 6522046 + ... + 6522057.

It is an arithmetic number, because the mean of its divisors is an integer number (19566156).

Almost surely, 2^78264618 is an apocalyptic number.

78264618 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.

78264618 is a wasteful number, since it uses less digits than its factorization.

78264618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13044108.

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

The square root of 78264618 is about 8846.7292261038. The cubic root of 78264618 is about 427.7484947678.

The spelling of 78264618 in words is "seventy-eight million, two hundred sixty-four thousand, six hundred eighteen".