78239246 has 16 divisors (see below), whose sum is σ = 118936080. Its totient is φ = 38596800.

The previous prime is 78239243. The next prime is 78239297. The reversal of 78239246 is 64293287.

It is a happy number.

It is a super-2 number, since 2×78239246² = 12242759229297032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78239243) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 82145 + ... + 83091.

It is an arithmetic number, because the mean of its divisors is an integer number (7433505).

Almost surely, 2^78239246 is an apocalyptic number.

78239246 is a deficient number, since it is larger than the sum of its proper divisors (40696834).

78239246 is a wasteful number, since it uses less digits than its factorization.

78239246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its digits is 145152, while the sum is 41.

The square root of 78239246 is about 8845.2951335724. The cubic root of 78239246 is about 427.7022669488.

The spelling of 78239246 in words is "seventy-eight million, two hundred thirty-nine thousand, two hundred forty-six".