78810834 has 16 divisors (see below), whose sum is σ = 164475072. Its totient is φ = 25128048.

The previous prime is 78810829. The next prime is 78810859. The reversal of 78810834 is 43801887.

It is a super-2 number, since 2×78810834² = 12422295111551112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78810792 and 78810801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285409 + ... + 285684.

It is an arithmetic number, because the mean of its divisors is an integer number (10279692).

Almost surely, 2^78810834 is an apocalyptic number.

78810834 is an abundant number, since it is smaller than the sum of its proper divisors (85664238).

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

78810834 is a wasteful number, since it uses less digits than its factorization.

78810834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571121.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 78810834 is about 8877.5466205478. The cubic root of 78810834 is about 428.7412874950.

The spelling of 78810834 in words is "seventy-eight million, eight hundred ten thousand, eight hundred thirty-four".