778255340 has 12 divisors (see below), whose sum is σ = 1634336256. Its totient is φ = 311302128.

The previous prime is 778255337. The next prime is 778255343. The reversal of 778255340 is 43552877.

It is an interprime number because it is at equal distance from previous prime (778255337) and next prime (778255343).

It is not an unprimeable number, because it can be changed into a prime (778255343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19456364 + ... + 19456403.

It is an arithmetic number, because the mean of its divisors is an integer number (136194688).

Almost surely, 2^778255340 is an apocalyptic number.

It is an amenable number.

778255340 is an abundant number, since it is smaller than the sum of its proper divisors (856080916).

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

778255340 is a wasteful number, since it uses less digits than its factorization.

778255340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38912776 (or 38912774 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 778255340 is about 27897.2281777240. The cubic root of 778255340 is about 919.8295761826.

The spelling of 778255340 in words is "seven hundred seventy-eight million, two hundred fifty-five thousand, three hundred forty".