78056459 has 4 divisors (see below), whose sum is σ = 84060816. Its totient is φ = 72052104.

The previous prime is 78056453. The next prime is 78056483. The reversal of 78056459 is 95465087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78056459 - 2⁴ = 78056443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78056453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002159 + ... + 3002184.

It is an arithmetic number, because the mean of its divisors is an integer number (21015204).

Almost surely, 2^78056459 is an apocalyptic number.

78056459 is a deficient number, since it is larger than the sum of its proper divisors (6004357).

78056459 is a wasteful number, since it uses less digits than its factorization.

78056459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6004356.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 78056459 is about 8834.9566495824. The cubic root of 78056459 is about 427.3689330657.

The spelling of 78056459 in words is "seventy-eight million, fifty-six thousand, four hundred fifty-nine".