688026452 has 12 divisors (see below), whose sum is σ = 1206211860. Its totient is φ = 343394496.

The previous prime is 688026413. The next prime is 688026457. The reversal of 688026452 is 254620886.

It can be written as a sum of positive squares in 2 ways, for example, as 412333636 + 275692816 = 20306^2 + 16604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688026457) 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, 152177 + ... + 156632.

It is an arithmetic number, because the mean of its divisors is an integer number (100517655).

Almost surely, 2^688026452 is an apocalyptic number.

It is an amenable number.

688026452 is a deficient number, since it is larger than the sum of its proper divisors (518185408).

688026452 is a wasteful number, since it uses less digits than its factorization.

688026452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309370 (or 309368 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 688026452 is about 26230.2583288842. The cubic root of 688026452 is about 882.8123062251.

The spelling of 688026452 in words is "six hundred eighty-eight million, twenty-six thousand, four hundred fifty-two".