78455834 has 4 divisors (see below), whose sum is σ = 117683754. Its totient is φ = 39227916.

The previous prime is 78455809. The next prime is 78455843. The reversal of 78455834 is 43855487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43855487 = 13 ⋅3373499.

It can be written as a sum of positive squares in only one way, i.e., 48260809 + 30195025 = 6947^2 + 5495^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19613957 + ... + 19613960.

Almost surely, 2^78455834 is an apocalyptic number.

78455834 is a deficient number, since it is larger than the sum of its proper divisors (39227920).

78455834 is a wasteful number, since it uses less digits than its factorization.

78455834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39227919.

The product of its digits is 537600, while the sum is 44.

The square root of 78455834 is about 8857.5297910874. The cubic root of 78455834 is about 428.0965696147.

The spelling of 78455834 in words is "seventy-eight million, four hundred fifty-five thousand, eight hundred thirty-four".