78115135 has 8 divisors (see below), whose sum is σ = 107129376. Its totient is φ = 53564640.

The previous prime is 78115129. The next prime is 78115151. The reversal of 78115135 is 53151187.

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

It is not a de Polignac number, because 78115135 - 2¹³ = 78106943 is a prime.

It is a super-2 number, since 2×78115135² = 12203948632136450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78115097 and 78115106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1115896 + ... + 1115965.

It is an arithmetic number, because the mean of its divisors is an integer number (13391172).

Almost surely, 2^78115135 is an apocalyptic number.

78115135 is a deficient number, since it is larger than the sum of its proper divisors (29014241).

78115135 is a wasteful number, since it uses less digits than its factorization.

78115135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231873.

The product of its digits is 4200, while the sum is 31.

The square root of 78115135 is about 8838.2766985425. The cubic root of 78115135 is about 427.4759924049.

The spelling of 78115135 in words is "seventy-eight million, one hundred fifteen thousand, one hundred thirty-five".