78261310 has 16 divisors (see below), whose sum is σ = 141376752. Its totient is φ = 31192000.

The previous prime is 78261299. The next prime is 78261311. The reversal of 78261310 is 1316287.

It is a super-2 number, since 2×78261310² = 12249665285832200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78261311) 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, 11116 + ... + 16735.

It is an arithmetic number, because the mean of its divisors is an integer number (8836047).

Almost surely, 2^78261310 is an apocalyptic number.

78261310 is a deficient number, since it is larger than the sum of its proper divisors (63115442).

78261310 is a wasteful number, since it uses less digits than its factorization.

78261310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28139.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 78261310 is about 8846.5422623757. The cubic root of 78261310 is about 427.7424681537.

Adding to 78261310 its reverse (1316287), we get a palindrome (79577597).

The spelling of 78261310 in words is "seventy-eight million, two hundred sixty-one thousand, three hundred ten".