678842241 has 32 divisors (see below), whose sum is σ = 1187865600. Its totient is φ = 334082880.

The previous prime is 678842239. The next prime is 678842243. The reversal of 678842241 is 142248876.

It is an interprime number because it is at equal distance from previous prime (678842239) and next prime (678842243).

It is not a de Polignac number, because 678842241 - 2¹ = 678842239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678842193 and 678842202.

It is not an unprimeable number, because it can be changed into a prime (678842243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72946 + ... + 81723.

It is an arithmetic number, because the mean of its divisors is an integer number (37120800).

Almost surely, 2^678842241 is an apocalyptic number.

It is an amenable number.

678842241 is a deficient number, since it is larger than the sum of its proper divisors (509023359).

678842241 is a wasteful number, since it uses less digits than its factorization.

678842241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154709.

The product of its digits is 172032, while the sum is 42.

The square root of 678842241 is about 26054.6011483577. The cubic root of 678842241 is about 878.8665853288.

It can be divided in two parts, 67884 and 2241, that added together give a triangular number (70125 = T₃₇₄).

The spelling of 678842241 in words is "six hundred seventy-eight million, eight hundred forty-two thousand, two hundred forty-one".