78982399 has 8 divisors (see below), whose sum is σ = 81918000. Its totient is φ = 76060992.

The previous prime is 78982369. The next prime is 78982417. The reversal of 78982399 is 99328987.

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 78982399 - 2¹⁵ = 78949631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78982339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8532 + ... + 15190.

It is an arithmetic number, because the mean of its divisors is an integer number (10239750).

Almost surely, 2^78982399 is an apocalyptic number.

78982399 is a deficient number, since it is larger than the sum of its proper divisors (2935601).

78982399 is a wasteful number, since it uses less digits than its factorization.

78982399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7097.

The product of its digits is 1959552, while the sum is 55.

The square root of 78982399 is about 8887.2042285524. The cubic root of 78982399 is about 429.0521740563.

The spelling of 78982399 in words is "seventy-eight million, nine hundred eighty-two thousand, three hundred ninety-nine".