78819334 has 16 divisors (see below), whose sum is σ = 135766080. Its totient is φ = 33941160.

The previous prime is 78819331. The next prime is 78819337. The reversal of 78819334 is 43391887.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78819331) and next prime (78819337).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78819331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93864 + ... + 94699.

It is an arithmetic number, because the mean of its divisors is an integer number (8485380).

Almost surely, 2^78819334 is an apocalyptic number.

78819334 is a deficient number, since it is larger than the sum of its proper divisors (56946746).

78819334 is a wasteful number, since it uses less digits than its factorization.

78819334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188595.

The product of its digits is 145152, while the sum is 43.

The square root of 78819334 is about 8878.0253435097. The cubic root of 78819334 is about 428.7567006464.

The spelling of 78819334 in words is "seventy-eight million, eight hundred nineteen thousand, three hundred thirty-four".