678860361 has 12 divisors (see below), whose sum is σ = 994009588. Its totient is φ = 446373504.

The previous prime is 678860327. The next prime is 678860363. The reversal of 678860361 is 163068876.

It can be written as a sum of positive squares in 2 ways, for example, as 228614400 + 450245961 = 15120^2 + 21219^2 .

It is not a de Polignac number, because 678860361 - 2⁷ = 678860233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678860363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515980 + ... + 517293.

Almost surely, 2^678860361 is an apocalyptic number.

It is an amenable number.

678860361 is a deficient number, since it is larger than the sum of its proper divisors (315149227).

678860361 is a wasteful number, since it uses less digits than its factorization.

678860361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033352 (or 1033349 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 678860361 is about 26054.9488773246. The cubic root of 678860361 is about 878.8744049762.

The spelling of 678860361 in words is "six hundred seventy-eight million, eight hundred sixty thousand, three hundred sixty-one".