688489426 has 32 divisors (see below), whose sum is σ = 1134416448. Its totient is φ = 312076800.

The previous prime is 688489393. The next prime is 688489481. The reversal of 688489426 is 624984886.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103501 + ... + 109951.

It is an arithmetic number, because the mean of its divisors is an integer number (35450514).

Almost surely, 2^688489426 is an apocalyptic number.

688489426 is a deficient number, since it is larger than the sum of its proper divisors (445927022).

688489426 is a wasteful number, since it uses less digits than its factorization.

688489426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586.

The product of its digits is 5308416, while the sum is 55.

The square root of 688489426 is about 26239.0820342481. The cubic root of 688489426 is about 883.0102770550.

The spelling of 688489426 in words is "six hundred eighty-eight million, four hundred eighty-nine thousand, four hundred twenty-six".