778374792 has 96 divisors (see below), whose sum is σ = 2341375200. Its totient is φ = 239488704.

The previous prime is 778374721. The next prime is 778374799. The reversal of 778374792 is 297473877.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (778374799) 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 23 ways as a sum of consecutive naturals, for example, 25843 + ... + 47165.

It is an arithmetic number, because the mean of its divisors is an integer number (24389325).

Almost surely, 2^778374792 is an apocalyptic number.

778374792 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778374792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170687600).

778374792 is an abundant number, since it is smaller than the sum of its proper divisors (1563000408).

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

778374792 is a wasteful number, since it uses less digits than its factorization.

778374792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21364 (or 21341 counting only the distinct ones).

The product of its digits is 4148928, while the sum is 54.

The square root of 778374792 is about 27899.3690251231. The cubic root of 778374792 is about 919.8766343719.

The spelling of 778374792 in words is "seven hundred seventy-eight million, three hundred seventy-four thousand, seven hundred ninety-two".