78191134 has 32 divisors (see below), whose sum is σ = 139435200. Its totient is φ = 32213664.

The previous prime is 78191131. The next prime is 78191167. The reversal of 78191134 is 43119187.

It is a super-2 number, since 2×78191134² = 12227706872411912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78191134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78191131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341332 + ... + 341560.

It is an arithmetic number, because the mean of its divisors is an integer number (4357350).

Almost surely, 2^78191134 is an apocalyptic number.

78191134 is a deficient number, since it is larger than the sum of its proper divisors (61244066).

78191134 is an equidigital number, since it uses as much as digits as its factorization.

78191134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 267 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 78191134 is about 8842.5750774308. The cubic root of 78191134 is about 427.6145793669.

The spelling of 78191134 in words is "seventy-eight million, one hundred ninety-one thousand, one hundred thirty-four".