778827045 has 64 divisors (see below), whose sum is σ = 1323786240. Its totient is φ = 390432000.

The previous prime is 778827041. The next prime is 778827067. The reversal of 778827045 is 540728877.

It is a happy number.

It is not a de Polignac number, because 778827045 - 2² = 778827041 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 778826985 and 778827003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778827041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4663552 + ... + 4663718.

It is an arithmetic number, because the mean of its divisors is an integer number (20684160).

Almost surely, 2^778827045 is an apocalyptic number.

It is an amenable number.

778827045 is a deficient number, since it is larger than the sum of its proper divisors (544959195).

778827045 is a wasteful number, since it uses less digits than its factorization.

778827045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 878080, while the sum is 48.

The square root of 778827045 is about 27907.4729239320. The cubic root of 778827045 is about 920.0547561140.

The spelling of 778827045 in words is "seven hundred seventy-eight million, eight hundred twenty-seven thousand, forty-five".