78349266 has 48 divisors (see below), whose sum is σ = 172972800. Its totient is φ = 25627680.

The previous prime is 78349259. The next prime is 78349273. The reversal of 78349266 is 66294387.

It is an interprime number because it is at equal distance from previous prime (78349259) and next prime (78349273).

It is a super-2 number, since 2×78349266² = 12277214965477512, which contains 22 as substring.

It is a Curzon 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 in 23 ways as a sum of consecutive naturals, for example, 351231 + ... + 351453.

It is an arithmetic number, because the mean of its divisors is an integer number (3603600).

Almost surely, 2^78349266 is an apocalyptic number.

78349266 is an abundant number, since it is smaller than the sum of its proper divisors (94623534).

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

78349266 is a wasteful number, since it uses less digits than its factorization.

78349266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 508 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 78349266 is about 8851.5120742165. The cubic root of 78349266 is about 427.9026513101.

The spelling of 78349266 in words is "seventy-eight million, three hundred forty-nine thousand, two hundred sixty-six".