781088 has 48 divisors (see below), whose sum is σ = 1923264. Its totient is φ = 303360.

The previous prime is 781087. The next prime is 781111. The reversal of 781088 is 880187.

781088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781088² = 1220196927488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (781087) 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, 2306 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (40068).

2⁷⁸¹⁰⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961632).

781088 is an abundant number, since it is smaller than the sum of its proper divisors (1142176).

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

781088 is a wasteful number, since it uses less digits than its factorization.

781088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 781088 is about 883.7918306932. The cubic root of 781088 is about 92.0944210195.

Subtracting 781088 from its reverse (880187), we obtain a palindrome (99099).

The spelling of 781088 in words is "seven hundred eighty-one thousand, eighty-eight".