778040 has 32 divisors (see below), whose sum is σ = 1788480. Its totient is φ = 304512.

The previous prime is 778027. The next prime is 778049. The reversal of 778040 is 40877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778049) by changing a digit.

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, 1937 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (55890).

2⁷⁷⁸⁰⁴⁰ 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 778040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894240).

778040 is an abundant number, since it is smaller than the sum of its proper divisors (1010440).

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

778040 is a wasteful number, since it uses less digits than its factorization.

778040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 778040 is about 882.0657571859. The cubic root of 778040 is about 91.9744730690.

The spelling of 778040 in words is "seven hundred seventy-eight thousand, forty".