677778244 has 24 divisors (see below), whose sum is σ = 1393475328. Its totient is φ = 284382240.

The previous prime is 677778239. The next prime is 677778289. The reversal of 677778244 is 442877776.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 677778191 and 677778200.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 591892 + ... + 593035.

It is an arithmetic number, because the mean of its divisors is an integer number (58061472).

Almost surely, 2^677778244 is an apocalyptic number.

It is an amenable number.

677778244 is an abundant number, since it is smaller than the sum of its proper divisors (715697084).

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

677778244 is a wasteful number, since it uses less digits than its factorization.

677778244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184955 (or 1184953 counting only the distinct ones).

The product of its digits is 3687936, while the sum is 52.

The square root of 677778244 is about 26034.1745403998. The cubic root of 677778244 is about 878.4071755010.

The spelling of 677778244 in words is "six hundred seventy-seven million, seven hundred seventy-eight thousand, two hundred forty-four".