678548478 has 8 divisors (see below), whose sum is σ = 1357096968. Its totient is φ = 226182824.

The previous prime is 678548477. The next prime is 678548503. The reversal of 678548478 is 874845876.

It is a happy number.

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

678548478 is an admirable number.

It is a super-2 number, since 2×678548478² = 920856073992232968, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678548473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56545701 + ... + 56545712.

It is an arithmetic number, because the mean of its divisors is an integer number (169637121).

Almost surely, 2^678548478 is an apocalyptic number.

678548478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

678548478 is a wasteful number, since it uses less digits than its factorization.

678548478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113091418.

The product of its digits is 12042240, while the sum is 57.

The square root of 678548478 is about 26048.9630887680. The cubic root of 678548478 is about 878.7397931133.

The spelling of 678548478 in words is "six hundred seventy-eight million, five hundred forty-eight thousand, four hundred seventy-eight".