78530293 has 16 divisors (see below), whose sum is σ = 85688064. Its totient is φ = 71677440.

The previous prime is 78530273. The next prime is 78530297. The reversal of 78530293 is 39203587.

It is not a de Polignac number, because 78530293 - 2²¹ = 76433141 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 (78530297) 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, 213796 + ... + 214162.

It is an arithmetic number, because the mean of its divisors is an integer number (5355504).

Almost surely, 2^78530293 is an apocalyptic number.

It is an amenable number.

78530293 is a deficient number, since it is larger than the sum of its proper divisors (7157771).

78530293 is a wasteful number, since it uses less digits than its factorization.

78530293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 78530293 is about 8861.7319413307. The cubic root of 78530293 is about 428.2319560364.

The spelling of 78530293 in words is "seventy-eight million, five hundred thirty thousand, two hundred ninety-three".