78258086 has 8 divisors (see below), whose sum is σ = 117449784. Its totient is φ = 39108160.

The previous prime is 78258083. The next prime is 78258109. The reversal of 78258086 is 68085287.

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

It is a super-2 number, since 2×78258086² = 12248656048766792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78258083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240 + ... + 13563.

It is an arithmetic number, because the mean of its divisors is an integer number (14681223).

Almost surely, 2^78258086 is an apocalyptic number.

78258086 is a deficient number, since it is larger than the sum of its proper divisors (39191698).

78258086 is a wasteful number, since it uses less digits than its factorization.

78258086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20886.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 78258086 is about 8846.3600424129. The cubic root of 78258086 is about 427.7365944099.

The spelling of 78258086 in words is "seventy-eight million, two hundred fifty-eight thousand, eighty-six".