78708258 has 24 divisors (see below), whose sum is σ = 170722188. Its totient is φ = 26207232.

The previous prime is 78708251. The next prime is 78708263. The reversal of 78708258 is 85280787.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76265289 + 2442969 = 8733^2 + 1563^2 .

It is a super-3 number, since 3×78708258³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78708251) 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 11 ways as a sum of consecutive naturals, for example, 20110 + ... + 23702.

Almost surely, 2^78708258 is an apocalyptic number.

78708258 is an abundant number, since it is smaller than the sum of its proper divisors (92013930).

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

78708258 is a wasteful number, since it uses less digits than its factorization.

78708258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818 (or 4815 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 78708258 is about 8871.7674676470. The cubic root of 78708258 is about 428.5551977663. Note that the first 3 decimals are identical.

The spelling of 78708258 in words is "seventy-eight million, seven hundred eight thousand, two hundred fifty-eight".