778974 has 32 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 209280.

The previous prime is 778963. The next prime is 778979. The reversal of 778974 is 479877.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778979) by changing a digit.

778974 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169 + ... + 1259.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁷⁷⁸⁹⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).

778974 is an abundant number, since it is smaller than the sum of its proper divisors (1108002).

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

778974 is a wasteful number, since it uses less digits than its factorization.

778974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its digits is 98784, while the sum is 42.

The square root of 778974 is about 882.5950373756. The cubic root of 778974 is about 92.0112620114.

The spelling of 778974 in words is "seven hundred seventy-eight thousand, nine hundred seventy-four".