78226516 has 24 divisors (see below), whose sum is σ = 143990784. Its totient is φ = 37134240.

The previous prime is 78226513. The next prime is 78226529. The reversal of 78226516 is 61562287.

It is a happy number.

It is a super-2 number, since 2×78226516² = 12238775610996512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78226513) 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 7 ways as a sum of consecutive naturals, for example, 621 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (5999616).

Almost surely, 2^78226516 is an apocalyptic number.

It is an amenable number.

78226516 is a deficient number, since it is larger than the sum of its proper divisors (65764268).

78226516 is a wasteful number, since it uses less digits than its factorization.

78226516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11991 (or 11989 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 78226516 is about 8844.5755127083. The cubic root of 78226516 is about 427.6790691061.

The spelling of 78226516 in words is "seventy-eight million, two hundred twenty-six thousand, five hundred sixteen".