684478488 has 32 divisors (see below), whose sum is σ = 1715880960. Its totient is φ = 227534880.

The previous prime is 684478453. The next prime is 684478489. The reversal of 684478488 is 884874486.

It is a super-2 number, since 2×684478488² = 937021601069532288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684478489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30048 + ... + 47663.

It is an arithmetic number, because the mean of its divisors is an integer number (53621280).

Almost surely, 2^684478488 is an apocalyptic number.

It is an amenable number.

684478488 is an abundant number, since it is smaller than the sum of its proper divisors (1031402472).

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

684478488 is a wasteful number, since it uses less digits than its factorization.

684478488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78087 (or 78083 counting only the distinct ones).

The product of its digits is 11010048, while the sum is 57.

The square root of 684478488 is about 26162.5397849674. The cubic root of 684478488 is about 881.2922165581.

The spelling of 684478488 in words is "six hundred eighty-four million, four hundred seventy-eight thousand, four hundred eighty-eight".