78329328 has 80 divisors (see below), whose sum is σ = 252293376. Its totient is φ = 20344320.

The previous prime is 78329327. The next prime is 78329347. The reversal of 78329328 is 82392387.

It is a super-2 number, since 2×78329328² = 12270967249863168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 78329328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78329327) 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, 6901 + ... + 14292.

Almost surely, 2^78329328 is an apocalyptic number.

It is an amenable number.

78329328 is an abundant number, since it is smaller than the sum of its proper divisors (173964048).

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

78329328 is a wasteful number, since it uses less digits than its factorization.

78329328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21222 (or 21216 counting only the distinct ones).

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

The square root of 78329328 is about 8850.3857543047. The cubic root of 78329328 is about 427.8663512599.

The spelling of 78329328 in words is "seventy-eight million, three hundred twenty-nine thousand, three hundred twenty-eight".