778055 has 8 divisors (see below), whose sum is σ = 949344. Its totient is φ = 612000.

The previous prime is 778051. The next prime is 778061. The reversal of 778055 is 550877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 778055 - 2² = 778051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (118668).

2⁷⁷⁸⁰⁵⁵ is an apocalyptic number.

778055 is a deficient number, since it is larger than the sum of its proper divisors (171289).

778055 is a wasteful number, since it uses less digits than its factorization.

778055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 778055 is about 882.0742599124. The cubic root of 778055 is about 91.9750641304.

The spelling of 778055 in words is "seven hundred seventy-eight thousand, fifty-five".