678533424 has 20 divisors (see below), whose sum is σ = 1752878136. Its totient is φ = 226177792.

The previous prime is 678533399. The next prime is 678533437. The reversal of 678533424 is 424335876.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7068009 + ... + 7068104.

Almost surely, 2^678533424 is an apocalyptic number.

It is an amenable number.

678533424 is an abundant number, since it is smaller than the sum of its proper divisors (1074344712).

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

678533424 is a wasteful number, since it uses less digits than its factorization.

678533424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14136124 (or 14136118 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 678533424 is about 26048.6741313258. The cubic root of 678533424 is about 878.7332946110.

The spelling of 678533424 in words is "six hundred seventy-eight million, five hundred thirty-three thousand, four hundred twenty-four".