78323210 has 32 divisors (see below), whose sum is σ = 164875392. Its totient is φ = 26228160.

The previous prime is 78323209. The next prime is 78323213. The reversal of 78323210 is 1232387.

It is a super-2 number, since 2×78323210² = 12269050449408200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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 78323210.

It is not an unprimeable number, because it can be changed into a prime (78323213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10001 + ... + 16020.

It is an arithmetic number, because the mean of its divisors is an integer number (5152356).

Almost surely, 2^78323210 is an apocalyptic number.

78323210 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78323210 is an abundant number, since it is smaller than the sum of its proper divisors (86552182).

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

78323210 is a wasteful number, since it uses less digits than its factorization.

78323210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26078.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 78323210 is about 8850.0401129034. The cubic root of 78323210 is about 427.8552113095.

Adding to 78323210 its reverse (1232387), we get a palindrome (79555597).

The spelling of 78323210 in words is "seventy-eight million, three hundred twenty-three thousand, two hundred ten".