78398322 has 32 divisors (see below), whose sum is σ = 166406400. Its totient is φ = 24538368.

The previous prime is 78398311. The next prime is 78398371. The reversal of 78398322 is 22389387.

It is a super-2 number, since 2×78398322² = 12292593784831368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72804 + ... + 73872.

It is an arithmetic number, because the mean of its divisors is an integer number (5200200).

Almost surely, 2^78398322 is an apocalyptic number.

78398322 is an abundant number, since it is smaller than the sum of its proper divisors (88008078).

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

78398322 is a wasteful number, since it uses less digits than its factorization.

78398322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810.

The product of its digits is 145152, while the sum is 42.

The square root of 78398322 is about 8854.2826925731. The cubic root of 78398322 is about 427.9919387366.

It can be divided in two parts, 7839 and 8322, that added together give a palindrome (16161).

The spelling of 78398322 in words is "seventy-eight million, three hundred ninety-eight thousand, three hundred twenty-two".