78217060 has 24 divisors (see below), whose sum is σ = 169921080. Its totient is φ = 30207744.

The previous prime is 78217057. The next prime is 78217081. The reversal of 78217060 is 6071287.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 389376 + 77827684 = 624^2 + 8822^2 .

It is a super-2 number, since 2×78217060² = 12235816950087200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66849 + ... + 68008.

It is an arithmetic number, because the mean of its divisors is an integer number (7080045).

Almost surely, 2^78217060 is an apocalyptic number.

It is an amenable number.

78217060 is an abundant number, since it is smaller than the sum of its proper divisors (91704020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78217060 is a wasteful number, since it uses less digits than its factorization.

78217060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134895 (or 134893 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 78217060 is about 8844.0409316104. The cubic root of 78217060 is about 427.6618358351.

The spelling of 78217060 in words is "seventy-eight million, two hundred seventeen thousand, sixty".