678437841 has 16 divisors (see below), whose sum is σ = 909429120. Its totient is φ = 449877120.

The previous prime is 678437839. The next prime is 678437843. The reversal of 678437841 is 148734876.

It is an interprime number because it is at equal distance from previous prime (678437839) and next prime (678437843).

It is not a de Polignac number, because 678437841 - 2¹ = 678437839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678437843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711421 + ... + 712373.

It is an arithmetic number, because the mean of its divisors is an integer number (56839320).

Almost surely, 2^678437841 is an apocalyptic number.

It is an amenable number.

678437841 is a deficient number, since it is larger than the sum of its proper divisors (230991279).

678437841 is a wasteful number, since it uses less digits than its factorization.

678437841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976.

The product of its digits is 903168, while the sum is 48.

The square root of 678437841 is about 26046.8393668023. The cubic root of 678437841 is about 878.6920311518.

The spelling of 678437841 in words is "six hundred seventy-eight million, four hundred thirty-seven thousand, eight hundred forty-one".