78355085 has 8 divisors (see below), whose sum is σ = 96567576. Its totient is φ = 60989760.

The previous prime is 78355051. The next prime is 78355097. The reversal of 78355085 is 58055387.

It can be written as a sum of positive squares in 4 ways, for example, as 6817321 + 71537764 = 2611^2 + 8458^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78355085 - 2⁶ = 78355021 is a prime.

It is a super-2 number, since 2×78355085² = 12279038690714450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 211586 + ... + 211955.

It is an arithmetic number, because the mean of its divisors is an integer number (12070947).

Almost surely, 2^78355085 is an apocalyptic number.

It is an amenable number.

78355085 is a deficient number, since it is larger than the sum of its proper divisors (18212491).

78355085 is a wasteful number, since it uses less digits than its factorization.

78355085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423583.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 78355085 is about 8851.8407690152. The cubic root of 78355085 is about 427.9132444912.

The spelling of 78355085 in words is "seventy-eight million, three hundred fifty-five thousand, eighty-five".