688400274 has 8 divisors (see below), whose sum is σ = 1376800560. Its totient is φ = 229466756.

The previous prime is 688400269. The next prime is 688400299. The reversal of 688400274 is 472004886.

It is a sphenic number, since it is the product of 3 distinct primes.

688400274 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57366684 + ... + 57366695.

It is an arithmetic number, because the mean of its divisors is an integer number (172100070).

Almost surely, 2^688400274 is an apocalyptic number.

688400274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688400274 is a wasteful number, since it uses less digits than its factorization.

688400274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114733384.

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 688400274 is about 26237.3831393300. The cubic root of 688400274 is about 882.9721619548.

The spelling of 688400274 in words is "six hundred eighty-eight million, four hundred thousand, two hundred seventy-four".