78115146 has 16 divisors (see below), whose sum is σ = 156328704. Its totient is φ = 26021984.

The previous prime is 78115129. The next prime is 78115151. The reversal of 78115146 is 64151187.

It is a happy number.

It is a super-2 number, since 2×78115146² = 12203952069202632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 9895 + ... + 15941.

It is an arithmetic number, because the mean of its divisors is an integer number (9770544).

Almost surely, 2^78115146 is an apocalyptic number.

78115146 is an abundant number, since it is smaller than the sum of its proper divisors (78213558).

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

78115146 is a wasteful number, since it uses less digits than its factorization.

78115146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8205.

The product of its digits is 6720, while the sum is 33.

The square root of 78115146 is about 8838.2773208358. The cubic root of 78115146 is about 427.4760124703.

The spelling of 78115146 in words is "seventy-eight million, one hundred fifteen thousand, one hundred forty-six".