778195040 has 96 divisors (see below), whose sum is σ = 2118057984. Its totient is φ = 264660480.

The previous prime is 778195031. The next prime is 778195049. The reversal of 778195040 is 40591877.

It is an interprime number because it is at equal distance from previous prime (778195031) and next prime (778195049).

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778195049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 139505 + ... + 144975.

It is an arithmetic number, because the mean of its divisors is an integer number (22063104).

Almost surely, 2^778195040 is an apocalyptic number.

778195040 is a gapful number since it is divisible by the number (70) 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 778195040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059028992).

778195040 is an abundant number, since it is smaller than the sum of its proper divisors (1339862944).

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

778195040 is a wasteful number, since it uses less digits than its factorization.

778195040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620 (or 5612 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 778195040 is about 27896.1474042564. The cubic root of 778195040 is about 919.8058191313.

The spelling of 778195040 in words is "seven hundred seventy-eight million, one hundred ninety-five thousand, forty".