78231302 has 4 divisors (see below), whose sum is σ = 117346956. Its totient is φ = 39115650.

The previous prime is 78231287. The next prime is 78231323. The reversal of 78231302 is 20313287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20313287 = 59 ⋅344293.

It is a super-2 number, since 2×78231302² = 12240273225230408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19557824 + ... + 19557827.

It is an arithmetic number, because the mean of its divisors is an integer number (29336739).

Almost surely, 2^78231302 is an apocalyptic number.

78231302 is a deficient number, since it is larger than the sum of its proper divisors (39115654).

78231302 is a wasteful number, since it uses less digits than its factorization.

78231302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39115653.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 78231302 is about 8844.8460698873. The cubic root of 78231302 is about 427.6877909154.

Adding to 78231302 its reverse (20313287), we get a palindrome (98544589).

The spelling of 78231302 in words is "seventy-eight million, two hundred thirty-one thousand, three hundred two".