688269030 has 32 divisors (see below), whose sum is σ = 1675116288. Its totient is φ = 180952800.

The previous prime is 688268983. The next prime is 688269031. The reversal of 688269030 is 30962886.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688269031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159436 + ... + 163695.

It is an arithmetic number, because the mean of its divisors is an integer number (52347384).

Almost surely, 2^688269030 is an apocalyptic number.

688269030 is an abundant number, since it is smaller than the sum of its proper divisors (986847258).

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

688269030 is a wasteful number, since it uses less digits than its factorization.

688269030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323212.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 688269030 is about 26234.8819322672. The cubic root of 688269030 is about 882.9160452990.

The spelling of 688269030 in words is "six hundred eighty-eight million, two hundred sixty-nine thousand, thirty".