78084019 has 8 divisors (see below), whose sum is σ = 84266000. Its totient is φ = 71927136.

The previous prime is 78083989. The next prime is 78084029. The reversal of 78084019 is 91048087.

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 78084019 - 2⁹ = 78083507 is a prime.

It is a super-2 number, since 2×78084019² = 12194228046384722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78084029) 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, 469 + ... + 12505.

It is an arithmetic number, because the mean of its divisors is an integer number (10533250).

Almost surely, 2^78084019 is an apocalyptic number.

78084019 is a deficient number, since it is larger than the sum of its proper divisors (6181981).

78084019 is a wasteful number, since it uses less digits than its factorization.

78084019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12549.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 78084019 is about 8836.5162253006. The cubic root of 78084019 is about 427.4192253029.

The spelling of 78084019 in words is "seventy-eight million, eighty-four thousand, nineteen".