78322387 has 8 divisors (see below), whose sum is σ = 92015280. Its totient is φ = 65724960.

The previous prime is 78322381. The next prime is 78322421.

78322387 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 78322387 - 2¹⁵ = 78289619 is a prime.

It is a super-2 number, since 2×78322387² = 12268792610755538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78322381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273712 + ... + 273997.

It is an arithmetic number, because the mean of its divisors is an integer number (11501910).

Almost surely, 2^78322387 is an apocalyptic number.

78322387 is a deficient number, since it is larger than the sum of its proper divisors (13692893).

78322387 is a wasteful number, since it uses less digits than its factorization.

78322387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547733.

The product of its digits is 112896, while the sum is 40.

The square root of 78322387 is about 8849.9936158169. The cubic root of 78322387 is about 427.8537127070.

The spelling of 78322387 in words is "seventy-eight million, three hundred twenty-two thousand, three hundred eighty-seven".