688344252 has 24 divisors (see below), whose sum is σ = 1632468432. Its totient is φ = 225686400.

The previous prime is 688344233. The next prime is 688344277. The reversal of 688344252 is 252443886.

It is a super-2 number, since 2×688344252² = 947635618522879008, which contains 22 as substring.

It is a congruent number.

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, 469449 + ... + 470912.

It is an arithmetic number, because the mean of its divisors is an integer number (68019518).

Almost surely, 2^688344252 is an apocalyptic number.

It is an amenable number.

688344252 is an abundant number, since it is smaller than the sum of its proper divisors (944124180).

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

688344252 is a wasteful number, since it uses less digits than its factorization.

688344252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940429 (or 940427 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The square root of 688344252 is about 26236.3155187614. The cubic root of 688344252 is about 882.9482092196.

The spelling of 688344252 in words is "six hundred eighty-eight million, three hundred forty-four thousand, two hundred fifty-two".