688397352 has 32 divisors (see below), whose sum is σ = 1741733280. Its totient is φ = 226700480.

The previous prime is 688397323. The next prime is 688397387. The reversal of 688397352 is 253793886.

It is a super-2 number, since 2×688397352² = 947781828481223808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 688397295 and 688397304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170799 + ... + 174782.

It is an arithmetic number, because the mean of its divisors is an integer number (54429165).

Almost surely, 2^688397352 is an apocalyptic number.

It is an amenable number.

688397352 is an abundant number, since it is smaller than the sum of its proper divisors (1053335928).

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

688397352 is a wasteful number, since it uses less digits than its factorization.

688397352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345673 (or 345669 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 688397352 is about 26237.3274553640. The cubic root of 688397352 is about 882.9709126582.

The spelling of 688397352 in words is "six hundred eighty-eight million, three hundred ninety-seven thousand, three hundred fifty-two".