781104 has 20 divisors (see below), whose sum is σ = 2017976. Its totient is φ = 260352.

The previous prime is 781087. The next prime is 781111. The reversal of 781104 is 401187.

It is a super-2 number, since 2×781104² = 1220246917632, which contains 22 as substring.

It is an unprimeable number.

781104 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 3 ways as a sum of consecutive naturals, for example, 8089 + ... + 8184.

2⁷⁸¹¹⁰⁴ is an apocalyptic number.

It is an amenable number.

781104 is an abundant number, since it is smaller than the sum of its proper divisors (1236872).

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

781104 is a wasteful number, since it uses less digits than its factorization.

781104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284 (or 16278 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 781104 is about 883.8008825522. The cubic root of 781104 is about 92.0950498435.

The spelling of 781104 in words is "seven hundred eighty-one thousand, one hundred four".